Keystones — Lintel
Five GCSE retrieval questions · 7 July 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 32.119 to 3 significant figures
Answer: 32.1 -
2. Algebra Linear nth term
Find the nth term: 35, 31, 27, 23, ...
Answer: 39 - 4n -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 23cm, angle = 58°
Answer: 282.8cm² -
4. Ratio Unitary method
If 10 items cost £20.50, how many items can you buy for £37.40?
Answer: 18.2 items -
5. Statistics Mode
What are the modes of: 18, 39, 39, 19, 27, 18
Answer: 18 and 39