Keystones — Cornerstone
Five GCSE retrieval questions · 5 July 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 55 + 34
Answer: 55 + 34 = 89 -
2. Algebra
Expand: 3(5x + 3)
Answer: 15x + 9 -
3. Geometry
Opposite = 10cm, hypotenuse = 11.5cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify the ratio 16:24
Answer: 2:3 -
5. Statistics
Find the mean of: 6, 10, 18, 11
Answer: 11.25