Keystones — Cornerstone
Five GCSE retrieval questions · 2 April 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 58 + 81
Answer: 58 + 81 = 139 -
2. Algebra
Solve: x + 3 = 18
Answer: x = 15 -
3. Geometry
Calculate the hypotenuse when a = 3cm and b = 8cm
Answer: 8.54cm -
4. Ratio
Simplify the ratio 12:21
Answer: 4:7 -
5. Statistics
Calculate the mean of: 40, 8, 34, 28, 26, 11
Answer: 24.5