Keystones — Lintel
Five GCSE retrieval questions · 29 August 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 5742 to 2 significant figures
Answer: 5700 -
2. Algebra Linear nth term
Determine the nth term rule: 0, 6, 12, 18, 24, ...
Answer: 6n + -6 -
3. Geometry Area using ½ab sin C
Calculate area: sides 20cm and 14cm, included angle 60°
Answer: 121.2cm² -
4. Ratio Unitary method
If 9 items cost £28.70, how many items can you buy for £43.00?
Answer: 13.5 items -
5. Statistics Mode
What are the modes of: 17, 15, 17, 36, 28, 36
Answer: 17 and 36