Keystones — Cornerstone
Five GCSE retrieval questions · 12 July 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 81 + 66
Answer: 81 + 66 = 147 -
2. Algebra
Solve: 4x + 4 = 2x + 18
Answer: x = 7 -
3. Geometry
Opposite = 11cm, adjacent = 15cm. Calculate the angle
Answer: 36.3° -
4. Ratio
Simplify: 6:18:6
Answer: 1:3:1 -
5. Statistics
Find the mean of: 14, 13, 18, 3
Answer: 12