Keystones — Cornerstone
Five GCSE retrieval questions · 18 November 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 8.1 + 6.5
Answer: 8.1 + 6.5 = 14.6 -
2. Algebra
Solve: 7x = 21
Answer: x = 3 -
3. Geometry
Opposite = 7cm, hypotenuse = 8.cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 10:12:10
Answer: 5:6:5 -
5. Statistics
Calculate the range of: 86, 53, 51, 69, 47, 86
Answer: 39