Keystones — Cornerstone

Five GCSE retrieval questions · 10 March 2024 · mathsvault.uk/keystones

1. Number

Calculate: 77 + 38

Answer: 77 + 38 = 115
2. Algebra

Solve: x + 3 = 16

Answer: x = 13
3. Geometry

Opposite = 6cm, hypotenuse = 6.9cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Simplify the ratio 15:21

Answer: 5:7
5. Statistics

What is the probability of getting heads when flipping a fair coin?

Answer: ¹⁄₂

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