Keystones — Lintel
Five GCSE retrieval questions · 11 July 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 993 + 661
Answer: 1654 -
2. Algebra
Solve: 3x + 4 = x - 9
Answer: x = 6.5 -
3. Geometry
Find c if a = 12cm and b = 19cm in a right triangle
Answer: 22.5cm -
4. Ratio
Simplify the ratio 2m:200cm
Answer: 1:100 -
5. Statistics
Find the range of: -16, -12, 34, 14, 12
Answer: 50