Keystones — Cornerstone
Five GCSE retrieval questions · 30 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 93 + 99
Answer: 93 + 99 = 192 -
2. Algebra
For y = x³, find y when x = 2
Answer: y = 8 -
3. Geometry
Calculate the perimeter of a right triangle with sides 12cm and 11cm
Answer: 39.3cm -
4. Ratio
Simplify the ratio 35:20
Answer: 7:4 -
5. Statistics
Calculate the mean of: 44, 45, 50, 44, 21, 11
Answer: 35.8