Keystones — Bedrock
Five GCSE retrieval questions · 19 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: -2 + (-6)
Answer: -8 -
2. Algebra
Simplify: 8x + 6x
Answer: 14x -
3. Geometry
Opposite = 8cm, hypotenuse = 11.3cm. Find the angle
Answer: 45° (approximately) -
4. Ratio
Simplify the ratio 14:10
Answer: 7:5 -
5. Statistics
Find the mean of: 10, 6, 15, 15, 20
Answer: 13.2