Keystones — Lintel
Five GCSE retrieval questions · 1 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 997 + 663
Answer: 1660 -
2. Algebra
What is the next term? 8, 24, 72, 216, ...
Answer: 648 -
3. Geometry
Adjacent = 21cm, hypotenuse = 36cm. Find the angle
Answer: 54.3° -
4. Ratio
Find 20% of 172
Answer: 34.4 -
5. Statistics
Find the range of: -15, 26, -14, -10, -30
Answer: 56