Keystones — Bedrock

Five GCSE retrieval questions · 29 May 2026 · mathsvault.uk/keystones

1. Number

Simplify: 9³ × 9³

Answer: 9⁶
2. Algebra

Simplify: 7x + 9x

Answer: 16x
3. Geometry

Opposite = 10cm, hypotenuse = 14.cm. Find the angle

Answer: 45° (approximately)
4. Ratio

Simplify the ratio 12:21

Answer: 4:7
5. Statistics

Find the mean of: 13, 4, 7, 8, 10

Answer: 8.4

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