Keystones — Cornerstone

Five GCSE retrieval questions · 5 March 2023 · mathsvault.uk/keystones

1. Number

Find the total of 142, 170, and 122

Answer: 434
2. Algebra

Solve: 8x = 88

Answer: x = 11
3. Geometry

Opposite = 9cm, hypotenuse = 10.4cm. Find the angle

Answer: 60° (approximately)
4. Ratio

Calculate 10% of 107

Answer: 10.7
5. Statistics

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

Answer: ¹⁄₂

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