Keystones — Cornerstone
Five GCSE retrieval questions · 20 March 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 83 + ? = 134
Answer: 51 -
2. Algebra
Solve: 8x = 24
Answer: x = 3 -
3. Geometry
Find the area of a circle with radius 9cm
Answer: 254.47cm² -
4. Ratio
Simplify: 4:12:6
Answer: 2:6:3 -
5. Statistics
Calculate the mean of: 28, 23, 31, 8, 44, 11, 21
Answer: 23.7