Keystones — Lintel
Five GCSE retrieval questions · 23 February 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 333 + 255
Answer: 333 + 255 = 588 -
2. Algebra
Find the next term: 1, 2, 4, 7, ...
Answer: 11 -
3. Geometry
Opposite = 17cm, adjacent = 11cm. Calculate the angle
Answer: 57.1° -
4. Ratio
Find 80% of 150
Answer: 120 -
5. Statistics
Calculate the mean of: 45, 26, 17, 8, 45, 28
Answer: 28.2