Keystones — Lintel
Five GCSE retrieval questions · 27 August 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 11.299 to 3 significant figures
Answer: 11.3 -
2. Algebra Linear nth term
Find the nth term: 15, 9, 3, -3, ...
Answer: 21 - 6n -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 22cm, angle = 43°
Answer: 157.5cm² -
4. Ratio Unitary method
If 5 items cost £33.30, how many items can you buy for £32.30?
Answer: 4.8 items -
5. Statistics Mode
Find the mode of: 29, 70, 58, 14, 45
Answer: No mode