Keystones — Cornerstone

Five GCSE retrieval questions · 27 October 2022 · mathsvault.uk/keystones

1. Number

Simplify: 7³ × 7⁵

Answer: 7⁸
2. Algebra

Solve: x + 4 = 23

Answer: x = 19
3. Geometry

Opposite = 8cm, hypotenuse = 16cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify: 4:4:6

Answer: 2:2:3
5. Statistics

Find the mean of: 7, 13, 9, 19, 9

Answer: 11.4

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