Keystones — Cornerstone
Five GCSE retrieval questions · 11 March 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 4060 to 2 significant figures
Answer: 4100 -
2. Algebra Factorising into a single bracket
Factorise: 12x + 15
Answer: 3(4x + 5) -
3. Geometry Speed, distance and time
A cyclist travels 392km in 3 hours. What is their average speed?
Answer: 130.66666666667km/h -
4. Ratio Percentage increase and decrease
Decrease 186 by 14%
Answer: 159.96 -
5. Statistics Simple probability
What is the probability of rolling a 4 on a fair die?
Answer: 1⁄6