Keystones — Lintel
Five GCSE retrieval questions · 24 August 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 2564 to 2 significant figures
Answer: 2600 -
2. Algebra Linear nth term
Find the nth term: 35, 32, 29, 26, ...
Answer: 38 - 3n -
3. Geometry Area using ½ab sin C
Calculate area: sides 19cm and 23cm, included angle 30°
Answer: 109.3cm² -
4. Ratio Unitary method
If 11 items cost £18.50, how many items can you buy for £42.80?
Answer: 25.4 items -
5. Statistics Mode
Find the mode of: 42, 64, 74, 13, 29
Answer: No mode