Keystones — Cornerstone
Five GCSE retrieval questions · 10 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 57 + 93
Answer: 57 + 93 = 150 -
2. Algebra
Expand: 2(4x + 5)
Answer: 8x + 10 -
3. Geometry
Find the distance between (4, 4) and (8, 9)
Answer: 6.4 -
4. Ratio
Simplify: 12:12:8
Answer: 3:3:2 -
5. Statistics
Calculate the mean of: 47, 11, 25, 28, 34, 50
Answer: 32.5