Keystones — Lintel
Five GCSE retrieval questions · 11 July 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 30.761 to 3 significant figures
Answer: 30.8 -
2. Algebra Linear nth term
Find the nth term: 31, 29, 27, 25, ...
Answer: 33 - 2n -
3. Geometry Area using ½ab sin C
Calculate area: sides 12cm and 10cm, included angle 60°
Answer: 52cm² -
4. Ratio Unitary method
If 6 items cost £19.30, how many items can you buy for £42.00?
Answer: 13.1 items -
5. Statistics Mode
What are the modes of: 19, 36, 18, 18, 27, 36
Answer: 18 and 36