Keystones — Lintel
Five GCSE retrieval questions · 16 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 998 + 900
Answer: 1898 -
2. Algebra
What is the next term? 5, 10, 20, 40, ...
Answer: 80 -
3. Geometry
Opposite = 8cm, adjacent = 18cm. Calculate the angle
Answer: 24° -
4. Ratio
Find 61% of 349
Answer: 212.89 -
5. Statistics
Calculate the mean of: 39, 13, 21, 31, 31, 17, 29
Answer: 25.9