Keystones — Lintel
Five GCSE retrieval questions · 23 October 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 31 + ? = 191
Answer: 160 -
2. Algebra
Solve: 2x = 30
Answer: x = 15 -
3. Geometry
Adjacent = 13cm, hypotenuse = 18cm. Find the angle
Answer: 43.8° -
4. Ratio
Calculate 37% of 202
Answer: 74.74 -
5. Statistics
Find the range of: -17, -26, 11, 26, 42
Answer: 68