Keystones — Bedrock

Five GCSE retrieval questions · 2 February 2024 · mathsvault.uk/keystones

1. Number

Simplify: 4⁵ × 4⁴

Answer: 4⁹
2. Algebra

Simplify: 9x + 8x

Answer: 17x
3. Geometry

Opposite = 10cm, hypotenuse = 11.5cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 12:14

Answer: 6:7
5. Statistics

Find the mean of: 4, 18, 7, 12, 5

Answer: 9.2

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