Keystones — Bedrock

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

1. Number

3000

Answer: 3 × 10³
2. Algebra

Find the next term: 12, 21, 30, 39, ...

Answer: 48
3. Geometry

Opposite = 12cm, hypotenuse = 17cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 15:25

Answer: 3:5
5. Statistics

Find the mean of: 20, 2, 10

Answer: 10.666666666667

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