Keystones — Lintel
Five GCSE retrieval questions · 18 February 2026 · mathsvault.uk/keystones
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1. Number
The sum of three consecutive numbers is 123. What are the numbers?
Answer: 40, 41, and 42 -
2. Algebra
Solve: 8x = 64
Answer: x = 8 -
3. Geometry
Adjacent = 30cm, hypotenuse = 35cm. Find the angle
Answer: 31° -
4. Ratio
Simplify: 9:6:18
Answer: 3:2:6 -
5. Statistics
Calculate the mean of: 34, 33, 37, 34, 24, 23, 42
Answer: 32.4