Keystones — Cornerstone
Five GCSE retrieval questions · 3 August 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 468 to 1 significant figure
Answer: 400 -
2. Algebra Factorising into a single bracket
Factorise: 4x² + 7x
Answer: x(4x + 7) -
3. Geometry Speed, distance and time
A car travels at 41km/h for 3 hours. How far does it travel?
Answer: 123km -
4. Ratio Percentage increase and decrease
Decrease 257 by 24%
Answer: 195.32 -
5. Statistics Simple probability
What is the probability of getting heads when flipping a fair coin?
Answer: 1⁄2