Keystones — Cornerstone
Five GCSE retrieval questions · 2 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 26 + 30
Answer: 26 + 30 = 56 -
2. Algebra
Solve: x + 12 = 21
Answer: x = 9 -
3. Geometry
Opposite = 12cm, adjacent = 18cm. Calculate the angle
Answer: 33.7° -
4. Ratio
Simplify: 6:15:18
Answer: 2:5:6 -
5. Statistics
Find the mean of: 12, 20, 9, 10
Answer: 12.75