Keystones — Lintel

Five GCSE retrieval questions · 25 May 2025 · mathsvault.uk/keystones

1. Number

The sum of three consecutive numbers is 108. What are the numbers?

Answer: 35, 36, and 37
2. Algebra

Solve: ^x⁄₃ = 5.3333333333333

Answer: x = 16
3. Geometry

Opposite = 16cm, adjacent = 10cm. Calculate the angle

Answer: 58°
4. Ratio

Simplify: 12:4:10

Answer: 6:2:5
5. Statistics

Calculate the mean of: 13, 8, 48, 28, 48, 7, 22

Answer: 24.9

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