Keystones — Cornerstone

Five GCSE retrieval questions · 21 February 2024 · mathsvault.uk/keystones

1. Number

Calculate: 122 + 651

Answer: 122 + 651 = 773
2. Algebra

Factorise: 9x² + 7x

Answer: x(9x + 7)
3. Geometry

Opposite = 15cm, adjacent = 16cm. Calculate the angle

Answer: 43.2°
4. Ratio

Calculate 50% of 124

Answer: 62
5. Statistics

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

Answer: ¹⁄₂

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