Keystones — Cornerstone
Five GCSE retrieval questions · 31 March 2026 · mathsvault.uk/keystones
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1. Number
Calculate: 3.6 + 6.9
Answer: 3.6 + 6.9 = 10.5 -
2. Algebra
Factorise: 5x² + 6x
Answer: x(5x + 6) -
3. Geometry
Opposite = 12cm, hypotenuse = 17cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify: 6:6:15
Answer: 2:2:5 -
5. Statistics
Calculate the mean of: 10, 24, 44, 32, 18, 9, 19
Answer: 22.3