Keystones — Lintel
Five GCSE retrieval questions · 3 July 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 82 + ? = 200
Answer: 118 -
2. Algebra
Expand: 8(3x - 2)
Answer: 24x - 16 -
3. Geometry
Adjacent = 23cm, hypotenuse = 28cm. Find the angle
Answer: 34.8° -
4. Ratio
Find 28% of 336
Answer: 94.08 -
5. Statistics
Calculate the mean of: 18, 48, 13, 42, 14, 43
Answer: 29.7