Keystones — Cornerstone
Five GCSE retrieval questions · 5 September 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 2.3 + 4.1
Answer: 2.3 + 4.1 = 6.4 -
2. Algebra
Solve: x + 13 = 22
Answer: x = 9 -
3. Geometry
Opposite = 16cm, adjacent = 20cm. Calculate the angle
Answer: 38.7° -
4. Ratio
Calculate 10% of 167
Answer: 16.7 -
5. Statistics
Calculate the mean of: 43, 7, 11, 29, 24, 12
Answer: 21