Keystones — Lintel
Five GCSE retrieval questions · 21 December 2025 · mathsvault.uk/keystones
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1. Number
Calculate: -14 + (3)
Answer: -11 -
2. Algebra
Solve: 3x = 45
Answer: x = 15 -
3. Geometry
Calculate the hypotenuse when a = 9cm and b = 12cm
Answer: 15cm -
4. Ratio
Simplify the ratio 3m:300cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 36, 44, 44, 23, 40, 16, 36, 31
Answer: 33.8