Keystones — Cornerstone

Five GCSE retrieval questions · 12 February 2022 · mathsvault.uk/keystones

1. Number

Simplify: x⁵ × x⁶

Answer: x¹¹
2. Algebra

Solve: 7x - 6 = 2x + 14

Answer: x = 4
3. Geometry

Opposite = 15cm, hypotenuse = 17.3cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify: 6:18:6

Answer: 1:3:1
5. Statistics

Calculate the mean of: 50, 13, 26, 12, 16, 27

Answer: 24

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