Keystones — Cornerstone
Five GCSE retrieval questions · 27 October 2025 · mathsvault.uk/keystones
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1. Number
What is √25?
Answer: 5 -
2. Algebra
Solve: 10x - 12 = 7x + 3
Answer: x = 5 -
3. Geometry
Opposite = 12cm, hypotenuse = 24cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 10:6:10
Answer: 5:3:5 -
5. Statistics
Find the mean of: 18, 14, 8, 2, 16
Answer: 11.6