Keystones — Cornerstone
Five GCSE retrieval questions · 1 August 2021 · mathsvault.uk/keystones
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1. Number
Calculate: 77 + 38
Answer: 77 + 38 = 115 -
2. Algebra
For y = x³, find y when x = 3
Answer: y = 27 -
3. Geometry
Calculate the area of a circle with diameter 9cm
Answer: 63.62cm² -
4. Ratio
Simplify: 12:8:6
Answer: 6:4:3 -
5. Statistics
A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?
Answer: 1⁄2