Keystones — Lintel
Five GCSE retrieval questions · 15 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 991 + 624
Answer: 1615 -
2. Algebra
Find the next term: 1, 4, 10, 19, ...
Answer: 31 -
3. Geometry
Opposite = 15cm, adjacent = 12cm. Calculate the angle
Answer: 51.3° -
4. Ratio
Simplify: 6:9:9
Answer: 2:3:3 -
5. Statistics
Calculate the mean of: 10, 22, 12, 37, 34, 9
Answer: 20.7