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Mental Math Shortcuts for the GRE – GREOrb

Calculate Faster Than the Calculator. Save Precious Time.

The Unfair Advantage on the Quant Section

The on-screen GRE calculator is slow, clumsy, and designed to waste your time. Top scorers know a secret: the fastest way to solve many Quant problems isn’t with a calculator, it’s with smart, strategic mental math. Our course trains you in the essential shortcuts that let you see the answer faster, save critical seconds on every question, and build a massive time advantage.

The Techniques We Teach

This isn’t about memorizing times tables. It’s about learning powerful techniques to simplify complex calculations on the fly.

1. Strategic Estimation & Approximation
Learn when an exact answer isn’t necessary. We’ll teach you how to intelligently round numbers to quickly eliminate answer choices and find the solution’s « ballpark, » often solving the problem in seconds.

2. Lightning-Fast Percentages
Never get stuck on percentage problems again. Master techniques for finding 10%, 1%, 50%, and 25% of any number instantly, and then combine them to calculate any percentage with ease.

3. Multiplication & Division Hacks
Doubling and Halving: A simple trick to make complex multiplications easy.
Factorization: Break down large numbers to simplify division and multiplication.
Digit-Based Tricks: Learn shortcuts for multiplying by 5, 9, 11, and other common numbers.

4. Fraction & Decimal Fluency
Switch between common fractions and their decimal equivalents (e.g., 1/8 = 0.125) without thinking. This fluency is a massive time-saver in data interpretation and comparison questions.

Why This Is a Game-Changer

Every second you save on an easy or medium question is a second you can invest in a hard, high-value question. Mental math isn’t a « nice-to-have » skill; it’s a core component of effective time management. By building your calculation speed, you reduce mental fatigue, lower your chance of making a careless error on the calculator, and approach the entire Quant section with more confidence and control.

How You’ll Master It: The Mental Math Gym

We make practice active and engaging. Our « Mental Math Gym » is an interactive training tool included in your course.

Timed Drills: Sharpen your speed and accuracy on specific techniques.

Adaptive Difficulty: The drills get harder as you get faster.

Instant Feedback: See your results and track your improvement over time.

Perfect For:

  • Students who automatically reach for the calculator for simple calculations like 15 x 4.
  • Anyone who consistently feels pressed for time on the GRE Quant section.
  • Test-takers aiming for a top-tier 165+ score where speed is a non-negotiable asset.
  • Professionals who want to refresh their foundational quantitative skills.

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Ready to Supercharge Your Calculation Speed?
Mental math shortcuts are integrated throughout our Quant lessons and are a core part of the GREOrb method.