Keystones — Cornerstone
Five GCSE retrieval questions · 2 November 2023 · mathsvault.uk/keystones
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1. Number
Calculate: 50 + 27
Answer: 50 + 27 = 77 -
2. Algebra
For y = x³, find y when x = 2
Answer: y = 8 -
3. Geometry
Find the hypotenuse of a right triangle with sides 8cm and 15cm
Answer: 17cm -
4. Ratio
Simplify: 20:12:12
Answer: 5:3:3 -
5. Statistics
Calculate the mean of: 21, 37, 31, 18, 43, 39
Answer: 31.5