Keystones — Lintel
Five GCSE retrieval questions · 2 November 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 48 + ? = 112
Answer: 64 -
2. Algebra
What is the next term? 3, 9, 27, 81, ...
Answer: 243 -
3. Geometry
Opposite = 15cm, adjacent = 11cm. Calculate the angle
Answer: 53.7° -
4. Ratio
Simplify: 16:20:16
Answer: 4:5:4 -
5. Statistics
Find the range of: -10, 47, 42, 50, 8
Answer: 60