Keystones — Cornerstone
Five GCSE retrieval questions · 23 January 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 55 + 25
Answer: 55 + 25 = 80 -
2. Algebra
Expand: 9(x + 2)
Answer: 9x + 18 -
3. Geometry
Opposite = 13cm, hypotenuse = 15cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify: 12:12:9
Answer: 4:4:3 -
5. Statistics
Calculate the mean of: 36, 14, 39, 23, 8, 29, 18
Answer: 23.9