Keystones — Cornerstone
Five GCSE retrieval questions · 4 January 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 24 + 61
Answer: 24 + 61 = 85 -
2. Algebra
Factorise: 40x + 40
Answer: 5(8x + 8) -
3. Geometry
Opposite = 9cm, adjacent = 14cm. Calculate the angle
Answer: 32.7° -
4. Ratio
Simplify: 12:18:15
Answer: 4:6:5 -
5. Statistics
Find the mean of: 11, 13, 2, 13
Answer: 9.75