Keystones — Cornerstone
Five GCSE retrieval questions · 6 February 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 82 + ? = 127
Answer: 45 -
2. Algebra
Solve: 7x = 21
Answer: x = 3 -
3. Geometry
Opposite = 14cm, adjacent = 17cm. Calculate the angle
Answer: 39.5° -
4. Ratio
Simplify: 16:24:8
Answer: 2:3:1 -
5. Statistics
Find the mean of: 15, 9, 17
Answer: 13.666666666667