Keystones — Bedrock

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

1. Number

80000

Answer: 8 × 10⁴
2. Algebra

Simplify: 8x + 5x

Answer: 13x
3. Geometry

Opposite = 10cm, hypotenuse = 20cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 20:25

Answer: 4:5
5. Statistics

Find the mean of: 6, 3, 11, 15, 4

Answer: 7.8

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