Keystones — Cornerstone
Five GCSE retrieval questions · 1 May 2021 · mathsvault.uk/keystones
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1. Number
What is the missing number: 79 + ? = 129
Answer: 50 -
2. Algebra
Expand: 5(2x + 7)
Answer: 10x + 35 -
3. Geometry
Find the area of a circle with radius 6cm
Answer: 113.cm² -
4. Ratio
Simplify: 24:24:20
Answer: 6:6:5 -
5. Statistics
Calculate the mean of: 47, 13, 22, 33, 14, 30, 8
Answer: 23.9