Keystones — Bedrock

Five GCSE retrieval questions · 6 February 2025 · mathsvault.uk/keystones

1. Number

Simplify: 9³ × 9³

Answer: 9⁶
2. Algebra

Simplify: 6x + 7x

Answer: 13x
3. Geometry

Opposite = 14cm, hypotenuse = 28cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 16:28

Answer: 4:7
5. Statistics

Find the mean of: 16, 8, 15, 12

Answer: 12.75

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