Keystones — Lintel
Five GCSE retrieval questions · 26 August 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 6418 to 2 significant figures
Answer: 6400 -
2. Algebra Linear nth term
Determine the nth term rule: 2, 8, 14, 20, 26, ...
Answer: 6n + -4 -
3. Geometry Area using ½ab sin C
Calculate area: sides 11cm and 16cm, included angle 60°
Answer: 76.2cm² -
4. Ratio Unitary method
If 11 items cost £16.40, how many items can you buy for £49.40?
Answer: 33.1 items -
5. Statistics Mode
What are the modes of: 30, 15, 34, 12, 34, 12
Answer: 12 and 34