Keystones — Cornerstone
Five GCSE retrieval questions · 12 July 2023 · mathsvault.uk/keystones
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1. Number
What is the missing number: 31 + ? = 142
Answer: 111 -
2. Algebra
Solve: 7x = 70
Answer: x = 10 -
3. Geometry
Opposite = 12cm, adjacent = 12cm. Calculate the angle
Answer: 45° -
4. Ratio
Simplify: 6:8:4
Answer: 3:4:2 -
5. Statistics
Find the mean of: 3, 6, 18
Answer: 9