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 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 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 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.
Watch on YouTube →
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.
Watch on YouTube →
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.
Watch on YouTube →
Can you solve this tricky rates problem?
A rates problem that trips up most students — try it yourself, then watch the 30-second solution.
Watch on YouTube →
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.
Watch on YouTube →
Can you solve this Algebra problem?
A classic algebra challenge — test your approach, then see how to solve it efficiently under time pressure.
Watch on YouTube →
Rate, time, work — simultaneous
How to handle combined work-rate problems when multiple actors work at the same time.
Watch on YouTube →
Multiple Choice Rate Problem
A multiple-choice rate problem with a clean shortcut — see how to eliminate wrong answers fast.
Watch on YouTube →
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.
Watch on YouTube →
Quantitative Comparison — Algebra (GRE)
A GRE Quantitative Comparison walkthrough focused on algebraic expressions — learn when to plug in vs. simplify.
Watch on YouTube →
Remainder Constraints Problem (GRE)
A number-properties question testing remainder logic — a common GRE trap with a clean systematic solution.
Watch on YouTube →