Keystones — Cornerstone
Five GCSE retrieval questions · 28 August 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 79 + 26
Answer: 79 + 26 = 105 -
2. Algebra
Solve: 3x = 39
Answer: x = 13 -
3. Geometry
Calculate the hypotenuse when a = 6cm and b = 15cm
Answer: 16.16cm -
4. Ratio
Simplify: 12:12:20
Answer: 3:3:5 -
5. Statistics
Calculate the mean of: 25, 20, 49, 43, 8, 21, 14, 41
Answer: 27.6