Keystones — Cornerstone

Five GCSE retrieval questions · 25 March 2023 · mathsvault.uk/keystones

1. Number

Simplify: 4² × 4²

Answer: 4⁴
2. Algebra

Solve: 2x = 28

Answer: x = 14
3. Geometry

Find the area of a circle with radius 6cm

Answer: 113.cm²
4. Ratio

Calculate 50% of 102

Answer: 51
5. Statistics

Calculate the mean of: 31, 17, 20, 32, 38, 9, 41, 15

Answer: 25.4

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