Keystones — Lintel
Five GCSE retrieval questions · 19 June 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 51 + ? = 121
Answer: 70 -
2. Algebra
Solve: 5x = 55
Answer: x = 11 -
3. Geometry
Opposite = 15cm, adjacent = 10cm. Calculate the angle
Answer: 56.3° -
4. Ratio
Find 81% of 324
Answer: 262.44 -
5. Statistics
Find the range of: -15, 26, -28, 45, -16
Answer: 73