Keystones — Cornerstone

Five GCSE retrieval questions · 7 November 2022 · mathsvault.uk/keystones

1. Number

Add: ⁵⁄₇ + ¹⁄₆

Answer: ³⁷⁄₄₂
2. Algebra

Solve: 6x = 72

Answer: x = 12
3. Geometry

Find the hypotenuse of a right triangle with sides 8cm and 15cm

Answer: 17cm
4. Ratio

Simplify the ratio 8:10

Answer: 4:5
5. Statistics

Calculate the mean of: 50, 14, 17, 32, 22, 20, 39, 48

Answer: 30.3

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