Keystones — Cornerstone
Five GCSE retrieval questions · 5 August 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 83 + 77
Answer: 83 + 77 = 160 -
2. Algebra
Expand: 3(5x + 7)
Answer: 15x + 21 -
3. Geometry
Calculate the area of a circle with diameter 14cm
Answer: 153.94cm² -
4. Ratio
Find 73% of 296
Answer: 216.08 -
5. Statistics
A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2