Keystones — Cornerstone

Five GCSE retrieval questions · 17 September 2022 · mathsvault.uk/keystones

1. Number

Calculate: 44 + (-14)

Answer: 30
2. Algebra

Solve: 5x = 45

Answer: x = 9
3. Geometry

Opposite = 18cm, adjacent = 9cm. Calculate the angle

Answer: 63.4°
4. Ratio

Simplify: 20:24:8

Answer: 5:6:2
5. Statistics

What is the probability of rolling a 4 on a fair die?

Answer: ¹⁄₆

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