Keystones — Cornerstone
Five GCSE retrieval questions · 30 April 2025 · mathsvault.uk/keystones
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1. Number
What is the missing number: 40 + ? = 176
Answer: 136 -
2. Algebra
Solve: 9x = 135
Answer: x = 15 -
3. Geometry
Find the area of a circle with radius 3cm
Answer: 28.27cm² -
4. Ratio
Calculate 50% of 188
Answer: 94 -
5. Statistics
Find the mean of: 8, 20, 3, 11
Answer: 10.5