WHAT YOU NEED TO KNOW
Improve GRE quantitative reasoning by checking what the question establishes, choosing an efficient method and testing the result. Speed without a sound setup makes avoidable errors harder to notice.
Practise the reasoning as well as the maths
ETS covers arithmetic, algebra, geometry and data analysis through several response formats. Identify whether the question asks for one answer, multiple answers, a numerical entry or a comparison before doing the calculation. Review the official examples rather than assuming every item is ordinary multiple choice.
Test more than one possible value
Consider an original comparison exercise: Quantity A is x and Quantity B is x², with no further restriction on x. At x=2, B is larger. At x=0.5, A is larger. At x=1, they are equal. The information does not establish one relationship.
The mistake is treating your first convenient example as proof. Read constraints first; then try zero, negative values and fractions where permitted. A diagram’s appearance is also not a substitute for stated measurements.
Write the model before calculating
If a price rises from 80 to 100, the increase is 20/80=25%, not 20/100=20%. Underline the original value, write the fraction and then simplify. Practise this setup until it is dependable under time pressure.
Use the permitted on-screen calculator when it helps; practise with the official interface. It cannot decide which denominator or equation the question requires.
Review by cause
After a timed set, label each miss: concept, setup, reading, arithmetic or time management. Redo it without the solution, then solve a fresh question testing the same idea. Memorising a worked answer is not evidence that you repaired the skill.
- Check units and constraints.
- Estimate the likely size of the answer.
- Answer the quantity actually requested.
- Keep one recurring error as the next session’s target.
Sources and further reading
Sources checked 2026-10-13. Examples and planning suggestions are Effikos editorial guidance.
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