Keystones — Cornerstone
Five GCSE retrieval questions · 20 September 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 70 + 70
Answer: 70 + 70 = 140 -
2. Algebra
Solve: x + 15 = 30
Answer: x = 15 -
3. Geometry
Opposite = 7cm, hypotenuse = 14cm. Find the angle
Answer: 30° (approximately) -
4. Ratio
Simplify the ratio 40:25
Answer: 8:5 -
5. Statistics
Calculate the mean of: 24, 47, 42, 17, 17, 30
Answer: 29.5