Keystones — Cornerstone
Five GCSE retrieval questions · 24 May 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 2 × 5 × 7
Answer: 70 -
2. Algebra
Factorise: 7x² + 9x
Answer: x(7x + 9) -
3. Geometry
Opposite = 9cm, hypotenuse = 10.4cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify the ratio 28:8
Answer: 7:2 -
5. Statistics
Find the mean of: 17, 5, 17, 2
Answer: 10.25