Keystones — Lintel

Five GCSE retrieval questions · 11 June 2022 · mathsvault.uk/keystones

1. Number

What is the missing number: 88 + ? = 171

Answer: 83
2. Algebra

Solve: ^x⁄₄ = 10

Answer: x = 40
3. Geometry

Opposite = 18cm, adjacent = 13cm. Calculate the angle

Answer: 54.2°
4. Ratio

Calculate 40.5% of 619

Answer: 250.7
5. Statistics

Calculate the mean of: 33, 47, 20, 5, 9, 15, 7

Answer: 19.4

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