Keystones — Cornerstone
Five GCSE retrieval questions · 28 April 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 1343 to 2 significant figures
Answer: 1300 -
2. Algebra Factorising into a single bracket
Factorise: 9x² + 4x
Answer: x(9x + 4) -
3. Geometry Speed, distance and time
A car travels at 73km/h for 2 hours. How far does it travel?
Answer: 146km -
4. Ratio Percentage increase and decrease
Decrease 436 by 38%
Answer: 270.32 -
5. Statistics Simple probability
What is the probability of getting heads when flipping a fair coin?
Answer: 1⁄2