Keystones Bedrock — 8 October 2021

Keystones — Bedrock

Five GCSE retrieval questions · 8 October 2021 · mathsvault.uk/keystones

1. Number

800000

Answer: 8 × 10⁵
2. Algebra

Factorise: 12x + 28

Answer: 4(3x + 7)
3. Geometry

Opposite = 13cm, hypotenuse = 15cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 12:8

Answer: 3:2
5. Statistics

Find the mean of: 8, 20, 14, 4

Answer: 11.5

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