Keystones — Capstone

Five GCSE retrieval questions · 28 March 2025 · mathsvault.uk/keystones

1. Number

Calculate: 990 + 741

Answer: 1731
2. Algebra

Solve: ^x⁄₄ = 9.25

Answer: x = 37
3. Geometry

Adjacent = 21cm, hypotenuse = 29cm. Find the angle

Answer: 43.6°
4. Ratio

Calculate 49.2% of 422

Answer: 207.62
5. Statistics

The mean of 5 numbers is 33. If 4 of them are 49, 32, 27, 15, what is the missing number?

Answer: 42

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