Free GMAT & GRE Resources
Guides, video walkthroughs, and in-depth articles — all free, from 15+ years of tutoring experience.
How Is the GMAT Scored?
GMAT scores come from an adaptive estimate of the difficulty you can sustain - not a count of right answers, and not your performance on the first questions. The scales, the algorithm, the unanswered-question penalty, and GMAC's own misconception list.
July 17, 2026 GREShould You Retake the GRE?
A GRE retake costs $220 and a 21-day wait, and ScoreSelect means schools see only the administrations you choose to send. The decision comes down to your section-level gap against school medians and the calendar.
July 17, 2026 GMATThe 7 Highest-Leverage GMAT Quant Strategies
The double-set matrix, rate-time-work tables, the see-saw method, smart numbers, backsolving, benchmark estimation, and prime factorization are the seven highest-leverage strategies for GMAT Problem Solving. Each comes with a recognition cue, a worked example, and the reason it works.
July 16, 2026 GREWhen Should You Take the GRE for Your MBA Application?
The GRE only requires two days' registration notice, but building in safe room for one retake takes about 31 days. Here's the exact backward-planning math for a working professional targeting an MBA application deadline.
July 16, 2026 GMATGMAT Data Sufficiency: The AD/BCE Method and the C-Trap
A systematic elimination method for GMAT Data Sufficiency questions, plus the classic C-trap that makes strong test-takers pick C when D is correct.
July 16, 2026 GREWhat GRE Score Do You Need for a Top MBA Program?
Harvard, Yale SOM, and NYU Stern's most recent MBA classes posted median GRE scores of 163-166 on each section. Here's the official class-profile data, the percentile context ETS itself publishes, and why there's no such thing as an official GRE 'total' score.
July 14, 2026 GMATShould You Retake the GMAT? A Decision Framework
A data-backed framework for deciding whether a GMAT retake is worth it, built on GMAC's own percentile table, its 2011 repeat-testing research, and the official retake policy.
July 14, 2026Strategy guides & tip sheets
The Data Insights 'Domination' Roadmap GMAT
A concise strategy guide covering every Data Insights question type on the GMAT — with worked examples and time-saving frameworks.
What 1,000 Students Taught Me About Beating the GMAT GMAT
10 battle-tested principles from 15+ years of tutoring — covering quant shortcuts, verbal score drivers, and the mindset shifts that separate top scorers.
Text Completion Tip Sheet GRE
A quick-reference guide to GRE Text Completion — covering structural clues, elimination strategy, and the most common trap patterns.
Coming soonVideo walkthroughs
Can you spot my error? (GMAT)
A worked GMAT problem where Simon deliberately makes a common mistake — see if you can catch it before the reveal.
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Are you making this mistake on overlapping sets? (GMAT)
The most common error students make on GMAT overlapping-set problems, and a simple framework to avoid it.
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3 guessing strategies on combinatorics & probability
When time is short and the math looks ugly, these three strategic guessing techniques can save you on test day.
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Can you solve this tricky rates problem?
A rates problem that trips up most students — try it yourself, then watch the 30-second solution.
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Rates working against each other — 30-second solution
When two rates oppose each other, there's a shortcut most students miss. This walkthrough shows the fast way.
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Can you solve this Algebra problem?
A classic algebra challenge — test your approach, then see how to solve it efficiently under time pressure.
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Rate, time, work — simultaneous
How to handle combined work-rate problems when multiple actors work at the same time.
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Multiple Choice Rate Problem
A multiple-choice rate problem with a clean shortcut — see how to eliminate wrong answers fast.
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20-second smart guess for GMAT probability
When a probability question looks impossible under time pressure, this estimation technique gets you to the right answer fast.
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Quantitative Comparison — Algebra (GRE)
A GRE Quantitative Comparison walkthrough focused on algebraic expressions — learn when to plug in vs. simplify.
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Remainder Constraints Problem (GRE)
A number-properties question testing remainder logic — a common GRE trap with a clean systematic solution.
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