Keystones — Bedrock

Five GCSE retrieval questions · 28 July 2024 · mathsvault.uk/keystones

1. Number

9000

Answer: 9 × 10³
2. Algebra

Factorise: 20x + 28

Answer: 4(5x + 7)
3. Geometry

Opposite = 11cm, hypotenuse = 15.6cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 30:10

Answer: 3:1
5. Statistics

Find the mean of: 13, 13, 5, 18, 12

Answer: 12.2

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