Keystones — Cornerstone
Five GCSE retrieval questions · 12 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 71 + 81
Answer: 71 + 81 = 152 -
2. Algebra
Solve: x + 2 = 14
Answer: x = 12 -
3. Geometry
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio
Simplify the ratio 21:24
Answer: 7:8 -
5. Statistics
Calculate the range of: 30, 64, 64, 56, 22, 24
Answer: 42