Keystones — Cornerstone
Five GCSE retrieval questions · 16 April 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 426 + 102
Answer: 426 + 102 = 528 -
2. Algebra
Expand: 7(x + 3)
Answer: 7x + 21 -
3. Geometry
Calculate the area of a right triangle with perpendicular sides 6cm and 10cm
Answer: 30cm² -
4. Ratio
Simplify: 6:4:12
Answer: 3:2:6 -
5. Statistics
Calculate the mean of: 12, 32, 23, 36, 13, 37, 5
Answer: 22.6