Keystones — Cornerstone

Five GCSE retrieval questions · 25 October 2022 · mathsvault.uk/keystones

1. Number

Simplify: 3³ × 3⁴

Answer: 3⁷
2. Algebra

Solve: 4x = 60

Answer: x = 15
3. Geometry

Find the hypotenuse of a right triangle with sides 5cm and 12cm

Answer: 13cm
4. Ratio

Simplify: 16:12:16

Answer: 4:3:4
5. Statistics

Calculate the mean of: 8, 32, 21, 32, 50, 11, 43

Answer: 28.1

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