Keystones — Capstone

Five GCSE retrieval questions · 13 April 2025 · mathsvault.uk/keystones

1. Number

Calculate: 992 + 519

Answer: 1511
2. Algebra

Solve: ^x⁄₄ = 7.75

Answer: x = 31
3. Geometry

Adjacent = 20cm, hypotenuse = 34cm. Find the angle

Answer: 54°
4. Ratio

Calculate 28.9% of 398

Answer: 115.02
5. Statistics

The mean of 4 numbers is 24. If 3 of them are 31, 30, 32, what is the missing number?

Answer: 3

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