Keystones — Cornerstone

Five GCSE retrieval questions · 18 April 2024 · mathsvault.uk/keystones

1. Number

Simplify: x³ × x⁷

Answer: x¹⁰
2. Algebra

Solve: 2x = 6

Answer: x = 3
3. Geometry

Find the area of a circle with radius 8cm

Answer: 201.06cm²
4. Ratio

Simplify: 15:12:18

Answer: 5:4:6
5. Statistics

Find the mean of: 18, 4, 10

Answer: 10.666666666667

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