Keystones — Lintel
Five GCSE retrieval questions · 19 June 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 998 + 625
Answer: 1623 -
2. Algebra
What is the next term? 5, 15, 45, 135, ...
Answer: 405 -
3. Geometry
Find c if a = 15cm and b = 12cm in a right triangle
Answer: 19.2cm -
4. Ratio
Simplify the ratio 4m:400cm
Answer: 1:100 -
5. Statistics
Calculate the mean of: 29, 47, 25, 37, 35, 37
Answer: 35