Keystones — Lintel
Five GCSE retrieval questions · 12 July 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 9488 to 2 significant figures
Answer: 9500 -
2. Algebra Linear nth term
Find the nth term: 34, 29, 24, 19, ...
Answer: 39 - 5n -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 22cm, b = 14cm, angle = 62°
Answer: 136cm² -
4. Ratio Unitary method
If 10 items cost £34.50, how many items can you buy for £20.70?
Answer: 6 items -
5. Statistics Mode
What are the modes of: 15, 15, 15, 39, 39, 25
Answer: 15 and 39