Keystones — Cornerstone
Five GCSE retrieval questions · 22 May 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 28 + 28
Answer: 28 + 28 = 56 -
2. Algebra
Simplify: 4x + 4x
Answer: 8x -
3. Geometry
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio
Simplify the ratio 24:32
Answer: 3:4 -
5. Statistics
Calculate the mean of: 16, 41, 21, 22, 7, 30, 30
Answer: 23.9