Keystones — Lintel
Five GCSE retrieval questions · 18 May 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 3950 to 2 significant figures
Answer: 4000 -
2. Algebra Linear nth term
Find the nth term: 26, 24, 22, 20, ...
Answer: 28 - 2n -
3. Geometry Area using ½ab sin C
Calculate area: sides 12cm and 14cm, included angle 60°
Answer: 72.7cm² -
4. Ratio Unitary method
8 kg costs £32.20. What is the cost of 17 kg?
Answer: £68.43 -
5. Statistics Mode
What are the modes of: 28, 36, 16, 16, 36, 16
Answer: 16 and 36