Keystones — Cornerstone

Five GCSE retrieval questions · 27 January 2022 · mathsvault.uk/keystones

1. Number

79000000

Answer: 7.9 × 10⁷
2. Algebra

Factorise: 6x² + 6x

Answer: 6x(x + 1)
3. Geometry

Opposite = 16cm, adjacent = 9cm. Calculate the angle

Answer: 60.6°
4. Ratio

Simplify the ratio 12:14

Answer: 6:7
5. Statistics

Find the mean of: 11, 19, 12, 14, 18

Answer: 14.8

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