Keystones — Cornerstone
Five GCSE retrieval questions · 22 October 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 92 + 53
Answer: 92 + 53 = 145 -
2. Algebra
For y = x³, find y when x = 4
Answer: y = 64 -
3. Geometry
Opposite = 13cm, hypotenuse = 18.4cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 40:20
Answer: 2:1 -
5. Statistics
Find the mean of: 16, 17, 13
Answer: 15.333333333333