Keystones — Cornerstone
Five GCSE retrieval questions · 2 December 2025 · mathsvault.uk/keystones
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1. Number
Find the total of 217, 125, and 150
Answer: 492 -
2. Algebra
Solve: 8x = 72
Answer: x = 9 -
3. Geometry
Calculate the area of a circle with diameter 22cm
Answer: 380.13cm² -
4. Ratio
Calculate 25% of 189
Answer: 47.25 -
5. Statistics
A bag has 4 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 4⁄11