Keystones — Lintel
Five GCSE retrieval questions · 14 July 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 39 + ? = 158
Answer: 119 -
2. Algebra
Solve: 8x = 88
Answer: x = 11 -
3. Geometry
Opposite = 16cm, adjacent = 19cm. Calculate the angle
Answer: 40.1° -
4. Ratio
Calculate 20.4% of 940
Answer: 191.76 -
5. Statistics
Calculate the mean of: 8, 11, 48, 42, 10, 48
Answer: 27.8