Keystones — Cornerstone
Five GCSE retrieval questions · 4 September 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 87 + 39
Answer: 87 + 39 = 126 -
2. Algebra
Solve: x + 12 = 30
Answer: x = 18 -
3. Geometry
Opposite = 12cm, hypotenuse = 13.9cm. Find the angle
Answer: 60° (approximately) -
4. Ratio
Simplify the ratio 24:15
Answer: 8:5 -
5. Statistics
Find the mean of: 20, 15, 19, 8
Answer: 15.5