Keystones — Cornerstone
Five GCSE retrieval questions · 8 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 3.3 + 2.3
Answer: 3.3 + 2.3 = 5.6 -
2. Algebra
Solve: x + 10 = 14
Answer: x = 4 -
3. Geometry
Opposite = 12cm, adjacent = 18cm. Calculate the angle
Answer: 33.7° -
4. Ratio
Simplify: 20:8:24
Answer: 5:2:6 -
5. Statistics
Find the mean of: 6, 13, 2, 12, 2
Answer: 7