Keystones — Lintel
Five GCSE retrieval questions · 3 April 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 2584 to 2 significant figures
Answer: 2600 -
2. Algebra Linear nth term
Find the nth term: 14, 11, 8, 5, ...
Answer: 17 - 3n -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 21cm, b = 29cm, angle = 40°
Answer: 195.7cm² -
4. Ratio Unitary method
If 9 items cost £29.20, how many items can you buy for £41.50?
Answer: 12.8 items -
5. Statistics Mode
Find the mode of: 79, 25, 42, 14, 58
Answer: No mode