Keystones — Cornerstone
Five GCSE retrieval questions · 15 June 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 1659 to 2 significant figures
Answer: 1700 -
2. Algebra Factorising into a single bracket
Factorise: 40x + 35
Answer: 5(8x + 7) -
3. Geometry Speed, distance and time
A cyclist travels 360km in 4 hours. What is their average speed?
Answer: 90km/h -
4. Ratio Percentage increase and decrease
Increase 172 by 25%
Answer: 215 -
5. Statistics Simple probability
What is the probability of rolling a 1 on a fair die?
Answer: 1⁄6