Keystones — Lintel
Five GCSE retrieval questions · 23 May 2026 · mathsvault.uk/keystones
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1. Number Rounding to significant figures
Round 77.027 to 3 significant figures
Answer: 77 -
2. Algebra Linear nth term
Determine the nth term rule: 0, 4, 8, 12, 16, ...
Answer: 4n + -4 -
3. Geometry Area using ½ab sin C
Find area of triangle: a = 29cm, b = 18cm, angle = 46°
Answer: 187.7cm² -
4. Ratio Unitary method
8 kg costs £20.90. What is the cost of 19 kg?
Answer: £49.64 -
5. Statistics Mode
What are the modes of: 31, 34, 24, 11, 31, 11
Answer: 11 and 31