Keystones — Cornerstone
Five GCSE retrieval questions · 31 May 2025 · mathsvault.uk/keystones
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1. Number
Calculate: 1 + (-6)
Answer: -5 -
2. Algebra
For y = x³ + 9, calculate y when x = 4
Answer: y = 73 -
3. Geometry
Calculate the area of a circle with diameter 21cm
Answer: 346.36cm² -
4. Ratio
Find 48% of 465
Answer: 223.2 -
5. Statistics
Calculate the mean of: 22, 10, 21, 46, 15, 39, 37, 7
Answer: 24.6