Keystones — Cornerstone
Five GCSE retrieval questions · 23 January 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 34 + ? = 188
Answer: 154 -
2. Algebra
Expand: 5(2x + 5)
Answer: 10x + 25 -
3. Geometry
Find the hypotenuse of a right triangle with sides 5cm and 12cm
Answer: 13cm -
4. Ratio
Simplify: 8:16:24
Answer: 1:2:3 -
5. Statistics
Calculate the mean of: 30, 32, 43, 22, 15, 21, 38
Answer: 28.7