Keystones — Cornerstone
Five GCSE retrieval questions · 4 June 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 366 + 778
Answer: 366 + 778 = 1144 -
2. Algebra
Collect like terms: 3x + 2y + 5x + 5y
Answer: 8x + 7y -
3. Geometry
Calculate the area of a circle with diameter 17cm
Answer: 226.98cm² -
4. Ratio
Simplify: 15:12:9
Answer: 5:4:3 -
5. Statistics
Calculate the mean of: 21, 14, 15, 12, 39, 24, 24
Answer: 21.3