Keystones — Lintel

Five GCSE retrieval questions · 20 April 2025 · mathsvault.uk/keystones

1. Number

The sum of three consecutive numbers is 105. What are the numbers?

Answer: 34, 35, and 36
2. Algebra

Solve: ^x⁄₃ = 3.6666666666667

Answer: x = 11
3. Geometry

Opposite = 9cm, adjacent = 12cm. Calculate the angle

Answer: 36.9°
4. Ratio

Simplify: 18:9:9

Answer: 2:1:1
5. Statistics

Calculate the mean of: 35, 11, 48, 34, 28, 19

Answer: 29.2

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