Keystones — Lintel

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

1. Number

The sum of three consecutive numbers is 141. What are the numbers?

Answer: 46, 47, and 48
2. Algebra

Solve: ^x⁄₇ = 2.1428571428571

Answer: x = 15
3. Geometry

Opposite = 10cm, adjacent = 14cm. Calculate the angle

Answer: 35.5°
4. Ratio

Calculate 40.3% of 453

Answer: 182.56
5. Statistics

Calculate the mean of: 6, 29, 11, 50, 41, 42, 49, 13

Answer: 30.1

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