Keystones — Cornerstone
Five GCSE retrieval questions · 12 July 2026 · mathsvault.uk/keystones
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1. Number
What is the missing number: 92 + ? = 126
Answer: 34 -
2. Algebra
Solve: x + 7 = 19
Answer: x = 12 -
3. Geometry
Opposite = 9cm, hypotenuse = 12.7cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 32:8
Answer: 4:1 -
5. Statistics
Calculate the mean of: 20, 7, 7, 19, 13, 32, 31, 41
Answer: 21.3