Keystones — Cornerstone

Five GCSE retrieval questions · 28 March 2022 · mathsvault.uk/keystones

1. Number

17000000

Answer: 1.7 × 10⁷
2. Algebra

Solve: x + 4 = 20

Answer: x = 16
3. Geometry

Opposite = 8cm, hypotenuse = 16cm. Find the angle

Answer: 30° (approximately)
4. Ratio

Simplify the ratio 8:16

Answer: 1:2
5. Statistics

Find the mean of: 2, 12, 19, 12

Answer: 11.25

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