Keystones — Lintel
Five GCSE retrieval questions · 13 April 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 998 + 543
Answer: 1541 -
2. Algebra
Solve: 2x = 30
Answer: x = 15 -
3. Geometry
Opposite = 11cm, adjacent = 8cm. Calculate the angle
Answer: 54° -
4. Ratio
Simplify: 9:9:12
Answer: 3:3:4 -
5. Statistics
Calculate the mean of: 20, 26, 12, 9, 7, 5
Answer: 13.2