Keystones — Bedrock

Five GCSE retrieval questions · 12 June 2023 · mathsvault.uk/keystones

1. Number

500000

Answer: 5 × 10⁵
2. Algebra

Factorise: 10x + 6

Answer: 2(5x + 3)
3. Geometry

Opposite = 7cm, hypotenuse = 9.9cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Calculate 10% of 165

Answer: 16.5
5. Statistics

Find the mean of: 15, 6, 16, 13, 9

Answer: 11.8

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