Keystones — Cornerstone
Five GCSE retrieval questions · 16 April 2022 · mathsvault.uk/keystones
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1. Number
What is the missing number: 81 + ? = 163
Answer: 82 -
2. Algebra
Solve: 5x - 12 = 3x + 8
Answer: x = 10 -
3. Geometry
Calculate the area of a circle with diameter 22cm
Answer: 380.13cm² -
4. Ratio
Find 18% of 97
Answer: 17.46 -
5. Statistics
Calculate the mean of: 15, 13, 22, 38, 47, 22, 31, 15
Answer: 25.4