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GMAT® Exponents and Roots: A Complete Guide
Exponents and roots are two sides of the same coin. Here's a complete guide to exponent rules, fractional exponents, roots, and the common traps that cost students points on GMAT® quant questions.
GMAT® Probability: A Complete Guide
Probability questions intimidate a lot of GMAT® test takers. Here's a complete guide to approaching probability on the GMAT® Focus Edition, including the basic formula, counting methods, the and/or rules, complementary probability, worked examples, and common traps.
GMAT® Inequalities: A Complete Guide
Inequalities are equations with one extra rule. Here's a complete guide to solving GMAT® inequality questions, including the sign-flip rule, compound inequalities, common traps, and worked examples.
"To Mail a Package, the Rate Is x Cents for the First Pound..." — GMAT® Worked Solution
A GMAT® algebra problem with variables in answer choices: mailing two packages separately or combined. Solved with both algebra and plugging in numbers.
GMAT® Variables in Answer Choices: A Plug-In Numbers System That Reduces Algebra Errors
When GMAT® answer choices contain variables, plugging in numbers instead of doing algebra reduces errors for most test takers. Here's the system and when to use it.
GMAT® Reading Comprehension: How to Read for the Test
Reading comprehension on the GMAT® isn't about understanding everything. It's about knowing where to look and how to verify your answers. Here's a complete system for approaching RC passages and questions.
How to Write MBA Essays That Don't Sound Like Everyone Else's
Most MBA essays are interchangeable because applicants copy the same templates. Here's a framework for writing essays that sound like you — built on skills you already developed studying for the GMAT®.
GMAT® Critical Reasoning: A Complete Strategy
Critical reasoning questions test logic, but not the kind you'd find in a philosophy textbook. Here's a complete system for approaching every CR question type on the GMAT® Focus Edition.
GMAT® Data Sufficiency: How to Approach DS Questions
Data sufficiency questions don't ask you to solve for an answer. They ask whether you have enough information to solve. Here's a repeatable system for approaching DS questions on the GMAT® Focus Edition.
GMAT® Word Problems: A Complete Guide
Word problems are the most common question type on the GMAT® Quantitative section. Here's a complete guide to translating English into math, choosing the right approach, and avoiding the traps that cost the most points.
GMAT® Number Properties: A Complete Guide
Number properties questions test how well you understand how numbers behave. Here's a complete guide to primes, divisibility, odds and evens, remainders, and the testing-numbers system that handles most of them.
GMAT® Calculator: When Can You Use One?
The GMAT® doesn't allow a calculator on the Quant section, but you do get one for Data Insights. Here are the rules and how to prepare for no-calculator math.
How to Send GMAT® Scores to Schools
Everything you need to know about sending your GMAT® scores to business schools — the 48-hour free window, additional score reports, score selection, and the full timeline from test day to delivery.
GMAT® Ratios: How to Translate Word Problems Into Algebra
Ratios show up in GMAT® word problems more than almost any other math concept. Learn how to translate ratio language into algebraic variables, express ratios as fractions, and avoid the most common careless error — solving for the wrong ratio.
"To Mail a Package, the Rate Is x Cents for the First Pound..." — GMAT® Worked Solution
A GMAT® algebra problem about mailing packages with variable pricing — solved two ways: algebraic manipulation and plugging in numbers. Both methods reach the same answer.
GMAT® Quant: The 'Use What They Give You' Principle
On GMAT® quant questions, you're almost never given information unless it's necessary. Here's the system for identifying what to use, when to estimate, and when to plug in numbers instead of doing algebra.
How Many Times Can You Take the GMAT®?
The GMAT® lets you test up to five times per year with no lifetime cap. Here are the rules, the score reporting policy, and how to plan your attempts strategically.
What the WSJ Got Right (and Wrong) About MBA Demand
The Wall Street Journal says MBA pay and demand are declining. The data is more nuanced. Here's what the headlines get right, what they miss, and how to read MBA news critically.
Why AI Management Is a Skill Most MBAs Will Need
a16z says the next trillion in AI value will come from managing, not building. Here is what that means for MBA students and why business schools have not caught up yet.
GMAT® Practice Test Strategy: How Many to Take and When
Most people take practice tests too often and review them too little. Here's a complete strategy for scheduling, spacing, and sequencing your GMAT® practice tests — from baseline to test day.
GMAT® Timing Strategy: How to Pace Each Section
Timing pressure is one of the most common reasons GMAT® scores don't improve. Here's a section-by-section pacing system for Quant, Verbal, and Data Insights — with benchmarks, training methods, and common traps.
GMAT® Error Log: How to Track and Review Mistakes
The traditional GMAT® error log lumps all your mistakes into one list. Here's a two-list system that separates execution errors from knowledge gaps — and helps you fix both.
GMAT® Section Order: Does It Matter and Which Should You Pick?
GMAC studied 10,000+ exams and found no meaningful advantage to any section order. But psychological factors are real. Here's how to pick the right order for you.
Best GMAT® Section Order — How To Decide
GMAC ran a 10,000-exam study on section order and found no statistical advantage to any order. But psychological factors are real. Here's how to choose the order that gives you the best mental edge on test day.
GMAT® Verbal Score: What's Good and How to Improve
What's a good GMAT® Verbal score, how the section works, and how to improve your critical reasoning and reading comprehension using a review process that actually moves your score.
How Much Can You Increase Your GMAT® Score?
The GMAT® is learnable. Here's a framework for estimating how much you can improve, how long it might take, and where to find your fastest gains.
Why AI Doom Fears Could Make This the Best MBA Cycle in Years
AI doom narratives say robots will replace your job. But hiring data tells a different story — one where management skills matter more than ever. Combined with falling MBA application volume, this could be the best cycle to apply in years.
GMAT® Score Chart and Percentiles (2026)
Complete GMAT® Focus Edition score chart with percentile rankings for total scores and all three sections. Includes Classic-to-Focus conversion and a framework for setting your target score.
MBA Round 1 Deadlines 2026-2027: How to Plan Your GMAT® With Superscore
Round 1 MBA deadlines for 2026-2027 are confirmed. With GMAT® Superscore launching in August, your retake strategy just changed. Here's how to plan backward from your deadline.
"A Retail Appliance Store Priced a Video Recorder at 20% Above the Wholesale Cost..." — GMAT® Worked Solution
A GMAT® percent word problem that combines a 20% markup and a 10% employee discount. Step-by-step walkthrough using fractions for clean percent computation.
GMAT® Percent Word Problems: The Fraction System That Prevents Computation Errors
Most percent word problem mistakes come from decimal computation, not setup. Here's the fraction-based system and organizational habits that keep the math clean from start to finish.
The GRE Is Quietly Catching Up at Top MBA Programs
Every top MBA program says they've no preference between the GMAT and GRE. But the Class of 2027 data shows the GRE is closing the gap — and the trend is accelerating.
The MBA ROI Math in 2026: What Changes If You Pay Full Price
An MBA can cost 250,000 dollars in tuition and living expenses plus 200,000 in forgone salary. Here's a framework for deciding when full price makes sense — and when it doesn't.
AI in MBA Admissions 2026: What's Allowed, What's Banned
Every top MBA program's AI policy for 2026 — what's allowed, what's banned, and what could get your application rejected. Updated for this cycle.
How to Build GMAT® Quant Confidence When You Feel Bad at Math
If you've always felt bad at math, GMAT® Quant can feel impossible. But the problem is probably not your ability — it's the advice you've been following. Here's a step-by-step framework for building quant confidence from zero.
Does Your Undergrad College or GPA Matter for MBA Admissions?
Your undergraduate GPA and college name play a role in MBA admissions — but not the role most applicants assume. Here's how admissions committees actually evaluate your academic background, and what you can still control.
GMAT® Quant Confidence — How To Build It, Even If You're Bad At Math
A step-by-step framework for building confidence with GMAT® Quant when you've always felt weak at math — from deleting bad advice to structured practice with official materials.
How to Negotiate MBA Scholarships
Business schools expect you to ask for more money. Here's a practical framework for using competing offers, timing, and your GMAT® score to negotiate MBA scholarships — without burning bridges.
How to Pay for Your MBA: Loans, Scholarships, and the 2026 Funding Shift
MBA tuition can exceed 200,000 dollars over two years. Here's a practical guide to the five main funding sources — and why the GMAT® score you already have may be the most valuable one.
"In a Weightlifting Competition the Total Weight of Joe's Two Lifts..." — GMAT® Worked Solution
A GMAT® word problem that rewards clean translation and the elimination method for a two-equation system. Step-by-step walkthrough with variables, equations, and the elimination technique.
GMAT® Word Problems: A Translation System That Prevents Costly Mistakes
Most GMAT® word problem errors come from organization, not math. Here's the translation system — write what's given, use half math half English, label variables, and reread before finalizing.
GMAT® Study Methods: Self-Study vs Course vs Tutor
Not sure whether to self-study, take a course, or hire a tutor? Here's an honest framework for choosing the right GMAT® prep method based on your timeline, budget, learning style, and score gap.
MBA Pay Is Declining — But Not at the Schools the GMAT® Opens Doors To
GMAC's 2026 survey shows median MBA pay dipping. But at M7 schools, salaries are still climbing. The GMAT® is the gatekeeper — and the skills you build studying for it are what employers value most.
Real GMAT® Problems Ep. 32: Word Problems
Three real GMAT® word problems from the Official Guide covering algebraic translation, fraction organization, and percent traps. Learn the system that prevents costly mistakes on word problems.
GMAT® Data Insights: A Complete Guide
The GMAT® Data Insights section is newer than quant and verbal, but it's not new. Here's a complete guide to both question types, all four IR formats, the data sufficiency process, and how to study for the section.
MBA Deadlines 2026-2027: Build Your GMAT® Prep Timeline
Every Round 1 and Round 2 deadline for 2026-2027. Work backward from your target school to build a GMAT® prep schedule that actually fits.
The MBA GMAT® Waiver Trend: What a Strong Score Still Gets You
More MBA programs are offering GMAT® waivers and test-optional policies. But a strong score still opens doors that waivers don't — including bigger scholarships at higher-ranked schools.
How Writing Down More Improves Your GMAT® Score
Most GMAT® score plateaus aren't knowledge gaps — they're execution errors. Here's what to write down in each section to stop missing questions you know how to do.
How Writing Down More Improves Your GMAT® Score
Scratch work is the most underrated lever in GMAT® prep. Isaac breaks down exactly what to write down in each section — Quant, Verbal, and Data Insights — to stop missing questions you know how to do.
How to Use the GMAT® Official Guide Effectively
The Official Guide is the most valuable book you can buy for GMAT® prep. But the default approach most people take leaves a lot of value on the table. Here's a system for getting the most out of every question.
What To Do If Your GMAT® Score Goes Down
A GMAT® score drop can feel devastating. Here are the five most common reasons scores decrease — and a concrete fix for each one, so you can turn it around before your next attempt.
Best GMAT® Study Materials and Resources for 2026
A practical way to choose GMAT® study materials without wasting weeks on the wrong stuff — what to use for learning, drilling, and full-test practice.
GMAT® Word Problems: When Picking Numbers Beats Algebra
Variables in the answer choices? Picking numbers turns abstract algebra into simple arithmetic. Here's the three-step system and when to use it instead of algebra.
"Last Sunday a Certain Store Sold Copies of Newspaper A..." — GMAT® Worked Solution
A dense word problem with variables in the answer choices. Two approaches — picking numbers and algebra — both get you to the same answer.
Best GMAT® Prep Courses Compared: An Honest Guide
Not an affiliate list. Not a paid ranking. An honest take on every major GMAT® prep option — from free resources to private tutoring — with real efficiency data for each.
How to Review GMAT® Practice Tests: A Three-Layer System
Most people take a practice test, check the score, and move on. Here's a three-layer review system that turns every GMAT® practice test into measurable score improvement.
The Week Before Your GMAT®: What to Do (and Not Do)
The final week before your GMAT® can raise your score or tank it. Here's a framework for studying, practice exams, logistics, sleep, and test-day execution.
GMAT® Superscore - What It Means For You
GMAC is launching GMAT® Superscore in August 2026. It automatically combines your best section scores across all attempts — free, automatic, and retroactive. Isaac explains what it changes, what it doesn't, and how to think about retakes now.
GMAT® Mindset: How to Build Mental Resilience for Test Day
The mental side of GMAT® prep matters as much as the quant and verbal skills. Here's how to build the mindset that holds up under pressure.
How Long Should You Study for the GMAT®?
There's no single answer to how long GMAT® prep takes. Your starting score, target score, weekly study hours, and study method all shape the timeline. Here's a framework for building a realistic plan.
GMAT® Superscore (August 2026): What Changes and What Doesn't
GMAT® Superscore launches August 2026. It combines your best section scores across attempts. Here's what it changes, what it doesn't, and how to use it.
What Studying for the GMAT® Can Teach You About Recruiting in Business School
A Duke Fuqua first-year shares what surprised her about MBA recruiting — and how the skills she built studying for the GMAT® gave her an edge.
How the GMAT® Scoring Algorithm Works
The GMAT® isn't scored like any test you've taken before. Understanding how the adaptive scoring algorithm actually works can change the way you study and the way you perform on test day.
How To Review GMAT® Practice Tests
A three-layer system for reviewing GMAT® practice tests that turns every exam into measurable improvement — covering timing assessment, execution habits, and question-by-question analysis.
When to Let Go of a GMAT® Question
Spending too long on hard GMAT® questions can cost you more points than getting them wrong. Here's how to build a pacing system that protects your score.
GMAT® Online vs. Test Center: Which Should You Choose?
Should you take the GMAT® at a test center or online at home? Here's what to consider — including tech risks, proctor issues, and when online might be the smarter choice.
GMAT® Club 2026-27 MBA Rankings: What the Scores Actually Tell You About Where to Apply
GMAT® Club released their 2026-27 MBA rankings with a 0-100 composite score. Here's what the data reveals about GMAT® score targets, natural tier breaks, and how to use rankings without letting them use you.
INSEAD's Recruitment Team Took Both the GMAT® and GRE® — Here Is What They Learned
INSEAD's recruitment team sat both the GMAT® and GRE® in person. Their three-part series offers a rare recruitment-side perspective on which test to take, how the exams differ, and how to prepare.
GMAT® vs. GRE vs. Executive Assessment: Which Should You Take?
Not sure whether to take the GMAT® Focus Edition, the GRE, or the Executive Assessment? Here's a decision framework based on your strengths, timeline, and goals.
When to Retake the GMAT® (And When Not To)
Not sure whether to retake the GMAT®? Here's a framework for weighing a retake against other parts of your MBA application — based on how far you're from the median, what went wrong, and where your time is best spent.
Car X and Car Y Traveled the Same 80-Mile Route — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® average speed problem: Car X and Car Y traveled the same 80-mile route. Rate chart setup, average speed formula, and full algebra walkthrough.
GMAT® Average Speed: Jill's Hill (Why Unknowns Cancel)
Jill goes up a hill at one speed and down at another. The rate chart with variables shows why the unknowns cancel — a beautiful GMAT® pattern.
During a Trip on an Expressway, Don Drove X Miles — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® average speed and percent change problem: During a trip on an expressway, Don drove a total of X miles. Four-row rate chart, variable algebra, and the percent change formula.
GMAT® Average Speed Problems: The Rate Chart and the Formula That Solve Them
Average speed on the GMAT® isn't the simple average of two speeds. Here's the formula, the rate chart setup, and the strategy that handles most distance and speed questions.
GMAT® Burnout: How to Spot It, Fix It, and Prevent It
Feeling exhausted from GMAT® prep? Burnout is common among high achievers studying for the exam. Here's how to recognize the signs, recover, and build a system that keeps it from happening again.
How to Study for the GMAT® While Working Full Time
Studying for the GMAT® with a full-time job means working with limited time and energy. Here's a system for making real progress without sacrificing the rest of your life.
Real GMAT® Problems Ep. 47: Average Speed
Walk through three real GMAT® average speed problems from the Official Guide. Learn the rate chart setup, the average speed formula, and how to take leaps of faith when the algebra gets complex.
0.1 + 0.1² + 0.1³ — GMAT® Worked Solution (Full Computation)
The GMAT decimal computation problem that looks easy until you do the math. Full walkthrough converting decimals to fractions — the clean way.
(0.045 × 1.9) ÷ (0.03 × 0.005 × 0.1) — GMAT® Solution
Convert every decimal to a fraction and this problem becomes clean. Full step-by-step walkthrough for the GMAT® Official Guide decimal computation.
If x = 1/(2² × 3² × 4² × 5²), How Many Distinct Non-Zero Digits Does x Have? — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® computation problem about distinct non-zero digits in a decimal. See how consolidating 2² × 5² reduces the problem to long division of 1 ÷ 144.
GMAT® Computation: When to Do the Math (and When to Let Go)
The biggest GMAT® computation mistake isn't bad math — it's skipping steps on problems you already know. Here's the system that fixes it.
Real GMAT® Problems Ep. 46: Computation
Walk through three real GMAT® computation problems from the Official Guide, from a decimal exponent warm-up to a hard question about distinct non-zero digits. Learn when to do the math, when to use fractions, and when to let a question go.
How to Build a GMAT® Study Plan That Works
A phase-by-phase framework for building your GMAT® study plan — from diagnostic test to test day. Covers how long each phase takes, how to schedule your time, and how to adjust the plan as you go.
What's on the GMAT®: The Complete Topic List
Every topic tested on the GMAT® Focus Edition — Quantitative Reasoning, Verbal Reasoning, and Data Insights — organized by section with notes on what to prioritize.
What Goes Into an MBA Application Beyond the GMAT® Score
The GMAT® is one piece of your MBA application. Here's what else admissions committees are looking at — and how each piece fits together.
What is a Good GMAT® Score?
A good GMAT® score depends on where you want to go. Here's how to figure out what score you actually need.
Is the GMAT® Hard?
The GMAT® feels harder than it actually is — because the exam is designed to show you questions you can't answer. Here's what that means for your prep.
How to Break Through a GMAT® Score Plateau
Is your GMAT® score stuck? Here are three keys to break through a score plateau.
How to Start Your GMAT® Studies in 2026
Just decided to take the GMAT®? Here's where to start — from your first practice test to building a study routine that actually works.
How to Study for the GMAT®: A Complete Guide
A step-by-step guide to studying for the GMAT®, from your first practice test to test day. Covers how to structure study time, how long it takes, what resources to use, and how to study while working full-time.
If the Absolute Value of x Equals the Absolute Value of y — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® algebra problem: 'If |x| = |y| and xy = 0, which of the following must be true?' See how plugging in numbers can rescue you when algebra stalls.
x Plus 1 Over x Minus 1 Squared — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® algebra problem: '((x+1)/(x−1))² — if x is replaced by 1/x, what's the resulting expression equivalent to?' See both the algebraic approach and the plugging-in shortcut.
If x and y Are Positive Which Must Be Greater Than 1 Over the Square Root of x Plus y — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® Roman numeral problem: 'If x and y are positive, which must be greater than 1/√(x+y)?' See how plugging in numbers cuts through the complexity.
GMAT® Algebra: What to Do When You're Stuck (Plugging In Numbers)
When standard algebra leads to a dead end on GMAT quant, plugging in numbers can save the question. Here's when and how to use this backup approach.
GMAT® Classic vs. GMAT® Focus Edition: What Changed and What It Means for You
The GMAT® got shorter, dropped Sentence Correction and Geometry, and changed the scoring scale. Here's what's actually different, what the scores mean now, and how to think about the transition.
Real GMAT® Problems Ep. 45: Algebra (What to Do When You're Stuck)
Walk through three real GMAT® algebra problems from the Official Guide, from warm-up to a question most people miss. Learn when and how to plug in numbers — a backup approach that can rescue you when standard algebra stalls.
GMAT® Work/Rate: Two Machines, One Production Order
One machine completes an order in 4 hours, another in 3. The rate chart makes this a structured arithmetic problem, not a guessing game.
GMAT® Work/Rate: Machine Y vs Machine Z (Variable Rates)
Machine Y produces 3 items in the same time Z produces 2. See how variables and multiple rows work in the rate chart — the key GMAT® setup.
GMAT® Work/Rate: Three Pumps, Only 30% Get It Right
Pumps A, B, and C fill a tank at different rates. A and B together take 6/5 hours. This is the one that separates 700-scorers from the rest.
GMAT® Work/Rate Problems: Why Organization Matters
Most people get GMAT® work/rate problems wrong because they lack a system for organizing the information, not because they're bad at math. Here's the chart that fixes that.
Real GMAT® Problems Ep. 44: Work/Rate Problems
Walk through three real GMAT® work/rate problems from the Official Guide, from warm-up to a question only 30% get right. Learn the rate chart system that keeps you organized under pressure.
U.S. News 2026 MBA Rankings: GMAT® Scores & Acceptance Rates
The full U.S. News 2026 Top 25 — median GMAT® scores, acceptance rates, and starting salaries. See what you need for your target school.
How to Use AI for GMAT® Prep: What Actually Works
A practical guide to using AI in your GMAT® preparation — what free and paid AI can actually help with, where it falls apart, and how to avoid common mistakes.
How To Use AI In Your GMAT® Preparation
A practical guide to using AI tools in your GMAT® prep — what works, what doesn't, and how to avoid the most common mistakes people are making right now with free and paid AI.
GMAT® Word Problem: Snack Shop Revenue (Half Math, Half English)
A snack shop averages $400/day in revenue. The setup is half math, half English — the average formula in both directions solves it.
GMAT® Word Problem: The Bracket Pricing Trap (Beverage Distributor)
A beverage distributor charges $60/case for 1-5 cases, $58 for 6+, $54 for 12+. The siloed-vs-cumulative trap catches most test-takers.
GMAT® Word Problem: Library Books (Rows-and-Columns Method)
30 students, 2 didn't borrow any books, some borrowed 2, some borrowed 3. A rows-and-columns table organizes this multi-step setup.
GMAT® Word Problems: Half Math, Half English, and the Setup That Prevents Translation Mistakes
Most GMAT® word problem mistakes happen before the math starts. The half math, half English step bridges reading and equations — and prevents the translation errors that cost the most points.
Real GMAT® Problems — Ep. 43 — Word Problems
Walk through three real GMAT® word problems from the Official Guide and discover why organization and the 'half math, half English' approach is the highest-leverage fix for most people.
GMAT® Statistics: Mean = Median for Multiples of 5
The first 10 positive multiples of 5 — is the average equal to the median? Brute force walkthrough plus the evenly-spaced-set shortcut.
GMAT® Statistics: Maximizing the Shortest Piece of Wood
Five pieces of wood, average 124 cm, median 140 cm. Maximize the shortest piece using the average formula and a median-anchored setup.
GMAT® Optimization: 30 Students, Maximize One (Statistics)
30 students borrow books from the library. Use the average formula to find the total, then minimize everyone else to maximize one student.
GMAT® Statistics: The Average, the Median, and the Shortcut That Saves You Time
GMAT® statistics rests on a few core ideas — the average formula, the definition of the median, and the property that mean equals median in evenly spaced sets. Here's the framework that handles most GMAT® statistics questions.
Real GMAT® Problems — Ep. 42 — Statistics
Work through three real GMAT® statistics problems from the Official Guide — from averages and medians to a challenging multi-constraint optimization question. Learn the key properties that save you time and the organizational habits that protect you from careless mistakes.
240, 120, 60, 30… What Is the Least Term Greater Than 1? — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® sequences problem: 240, 120, 60, 30… each term is half the preceding. Find the least term greater than 1 by listing terms in fractions, not decimals.
GMAT® Sequences: The Quiz Worth 360 Points (Find Q3)
A 10-question quiz where each question is worth 4 more points than the last, totaling 360. The arithmetic sequence formula finds Q3 in seconds.
If K Is the Sum of the Reciprocals of the Consecutive Integers From 43 to 48 Inclusive — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® sequences problem: K is the sum of the reciprocals of the consecutive integers from 43 to 48. High-low estimation brackets the answer in seconds.
GMAT® Sequences: Write Every Term, Use Fractions, and Solve What's Actually Asked
Sequences questions on the GMAT® reward boring habits — writing what's asked, listing every term, and staying in fractions instead of decimals. Here's the framework that prevents the most common mistakes.
Real GMAT® Problems - Ep. 41 - Sequences
Walk through real GMAT® sequences problems from the Official Guide. Learn how to write out every term clearly, why fractions beat decimals in sequence math, and the one habit that prevents the most common mistakes.
GMAT® Radicals: FOIL Conjugate Pairs in 3 Lines
Multiplying (√2+1)(√2−1)(√3+1)(√3−1) looks messy. FOIL twice, watch the middle terms cancel, and the answer appears in three lines.
Nested Square Roots: Which Value Is Undefined? GMAT®
√(1 − √(2 − √x)) — work inside out, test each answer choice, and understand why √0 is real but √(negative) isn't.
Squaring Nested Radicals: The Collapse to an Integer (GMAT®)
(√(9+√80) + √(9−√80))² looks impossible. FOIL the square, simplify with √a × √b = √(ab), and watch everything collapse.
GMAT® Square Roots: FOIL, Nested Radicals, and Why Zero Is Not Negative
Square roots on the GMAT® reward content knowledge more than strategy. Here's the FOIL setup, the rule for nested radicals, and the one definition that changes the answer on the harder problems.
Real GMAT® Problems - Ep. 40 - Square Roots
Tackle real GMAT® square roots problems from the Official Guide. Covers FOIL with radicals, nested square roots, and the content knowledge that separates students who get these right from those who don't.
If x > 0, x/50 + x/25 Is What Percent of x? — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® percent problem: if x > 0, x/50 + x/25 is what percent of x? One-word-at-a-time translation, common denominators, and full algebra.
If m > 0 and x is m% of y, Then in Terms of m, y is What Percent of x? — GMAT® Worked Solution
Step-by-step worked solution for the GMAT® percent problem: if x is m% of y, then in terms of m, y is what percent of x? One-word-at-a-time translation, substitution, and the m% trap.
GMAT® Word Problem: Darra's Treadmill (Percent + Unit Conversion)
A treadmill readout shows time remaining, not elapsed. Track both, convert units with labeled fractions, and avoid the setup trap.
Translating Percent Word Problems on the GMAT®: A One-Word-at-a-Time System
GMAT® percent word problems become much easier when you translate them one word at a time. Here's the four-word system that handles most percent questions on the exam.
Real GMAT® Problems - Ep. 39 - Translating Percents
Master percent word problems on the GMAT® with a simple translation framework. Work through real Official Guide problems and learn why one systematic approach beats memorizing a dozen different techniques.
GMAT® Number Properties: The Consecutive Integer Trap
Three statements about consecutive integers — which must be true? See the testing-numbers shortcut that makes this 30-second problem a 10-second one.
When the Sum of Consecutive Integers Is 0: GMAT® Shortcut
If the sum of N consecutive integers is 0, what must be true? The average reveals the answer instantly — if you know what to look for.
How Many Even Divisors Does N = 4p Have? GMAT® Strategy
When N = 4p and p is prime, counting even divisors seems complex. It's not — see the factor-pair method that makes it systematic.
Testing Numbers on the GMAT®: A Simple System That Beats Memorizing Number Theory
On GMAT® number properties questions, organized number testing usually beats memorizing number theory. Here's the system that handles most must-be-true and divisor questions.
Real GMAT® Problems - Ep. 38 - The Power Of Testing Numbers
Learn how testing numbers on GMAT® quant problems can replace months of number theory memorization. Work through real Official Guide problems — including Roman numeral and 'must be true' questions — and see why a simple, organized approach to plugging in values outperforms intuition-based strategies for most test-takers.
Real GMAT® Problems — Ep. 37 — Divisibility Shortcuts
Work through three real Official Guide divisibility problems and learn the shortcuts that save time on test day — divisibility rules for 3, 4, 5, 8, and 9, plus when to fall back on long division.
Real GMAT® Problems — Ep. 36 — Percent Word Problems
Three Official Guide percent word problems that build from a straightforward markup-and-discount warm-up to a concentration problem and a reverse-percent calculation — with emphasis on half-math-half-English notation, fraction-based computation, and finishing strong under fatigue.
Real GMAT® Problems - Ep. 35 - Plugging In Answers
Work through three real Official Guide problems that reward using the answer choices to your advantage. Covers guess-and-test with answer options, fabricated-number substitution, and why good organization on your scratch work prevents the most common mistakes on these question types.
What To Do The Week Before Your GMAT®
Five keys to a great final week of GMAT® prep — how to keep studying smart, when to take practice exams, logistics to handle in advance, controlling sleep and stress, and focusing on great execution on test day.
What To Do If Your GMAT® Score Goes Down
The five biggest reasons GMAT® scores drop — and a concrete fix for each one. Covers practice exam frequency, time management during sections, eliminating careless errors, test anxiety, and recognizing when to switch providers.
How To Cram For The GMAT®
A practical, tactical guide to cramming for the GMAT® when you don't have enough time. How to create more study hours, prioritize the right content, and fix timing, careless errors, and knowledge gaps on a short timeline.
How to Start Your GMAT® Studies in 2026
Everything you need to know to begin your GMAT® prep the right way — exam format, target scores, how to pick a study program, when to take your baseline test, and simple tips to accelerate your progress.
Real GMAT® Problems — Ep. 31 — Percents, Exponents, and Rounding
Three Official Guide problems covering percent computation, exponent subtraction traps, repeating decimals, and maximizing or minimizing a fraction with rounded values. Includes the critical rule: never use exponent shortcuts when adding or subtracting.
Real GMAT® Problems Ep. 15: Roots and Ratios
Three real GMAT® problems from the Official Guide 11th Edition covering exponent rules, ratio translation with variables, and converting percentages to ratios. Learn why you can't distribute exponents over addition, how to translate 'three times as many A as B' into algebra, and why writing what's given and what's asked prevents the most common ratio mistakes.
When To Retake The GMAT® (And When Not To)
A complete framework for deciding whether to retake the GMAT® — from the obvious retakes to the edge cases. Covers the 16-day waiting period, how to assess whether you can realistically score higher, when retaking hurts more than it helps, and how to structure a retake plan.
How To Switch GMAT® Providers
A step-by-step framework for deciding when to switch GMAT® prep providers, how to evaluate alternatives using data instead of marketing, and how to set a realistic budget and timeline based on your starting score and goals.
Can You Reach Your GMAT® Goal Score?
Yes. Isaac breaks down the three keys to reaching your goal score — the right plan, the right execution, and the right optimization — and why it's almost certainly possible for you.
How To Get Faster At GMAT® Focus Questions
Isaac shares a complete toolkit for building speed and accuracy on the GMAT® Focus Edition — from pattern recognition and the 80/20 study split to the count-up timer method that prevents you from building bad habits under pressure.
Work, Family, and Social Obligations — How to Study for the GMAT® with Limited Time
A practical framework for studying for the GMAT® when you've a full-time job, family responsibilities, and a packed schedule. Covers how to find a physical study space, start absurdly small, prioritize ruthlessly, and build momentum from almost nothing.
GMAT® Focus Test Day Experience — Online AND In Person
A complete walkthrough of what to expect on GMAT® test day — both the in-person test center experience and the online at-home exam. Covers check-in procedures, whiteboard options, break strategy, snack recommendations, and why the in-person exam is the safer bet for most test-takers.
GMAT® Focus Data Insights — The Complete Guide for 2024 and Beyond
Everything you need to know about the GMAT® Focus Data Insights section — integrated reasoning (all four question types), data sufficiency (value vs. yes/no), the calculator, scoring strategy, and a bulletproof six-step DS process.
GMAT® Focus Verbal — What You Should Know in 2024 and Beyond
Everything you need to know about the GMAT® Focus Verbal section — the two question types (critical reasoning and reading comprehension), how to study each one, the review process that actually moves your score, and why reading speed might be the thing holding you back.
GMAT® Focus Quant — What You Should Know in 2024 and Beyond
Everything you need to know about the GMAT® Focus Quant section — format, content, scoring, scratch work habits, time management with the 1-2-3 rule, and how to build a strategy that actually works on an adaptive exam.
Test Anxiety — What Everyone Should Know
A practical framework for diagnosing and addressing test anxiety on the GMAT® — covering physical symptoms, psychological overwhelm, and content gaps, with specific interventions for each level.
Study Plan — What to Do and When to Prepare for the GMAT®
Isaac walks through a complete GMAT® study plan from diagnostic test to test day — covering how to structure each phase, when to take practice tests, and how to stay efficient along the way.