Keystones — Cornerstone
Five GCSE retrieval questions · 11 December 2025 · mathsvault.uk/keystones
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1. Number
Find the total of 275, 164, and 101
Answer: 540 -
2. Algebra
Solve: x + 12 = 18
Answer: x = 6 -
3. Geometry
Opposite = 9cm, hypotenuse = 18cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify: 24:12:12
Answer: 2:1:1 -
5. Statistics
Calculate the mean of: 46, 17, 47, 39, 31, 49, 29, 50
Answer: 38.5