Keystones — Lintel
Five GCSE retrieval questions · 10 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 995 + 769
Answer: 1764 -
2. Algebra
Solve: 8x = 64
Answer: x = 8 -
3. Geometry
Find c if a = 10cm and b = 18cm in a right triangle
Answer: 20.6cm -
4. Ratio
Simplify the ratio 7m:700cm
Answer: 1:100 -
5. Statistics
Find the range of: 23, -29, -13, 22, -1
Answer: 52