Keystones — Cornerstone
Five GCSE retrieval questions · 27 September 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 804 to 1 significant figure
Answer: 800 -
2. Algebra Factorising into a single bracket
Factorise: 35x + 40
Answer: 5(7x + 8) -
3. Geometry Speed, distance and time
A cyclist travels 310km in 8 hours. What is their average speed?
Answer: 38.75km/h -
4. Ratio Percentage increase and decrease
Decrease 186 by 33%
Answer: 124.62 -
5. Statistics Simple probability
What is the probability of rolling a 2 on a fair die?
Answer: 1⁄6