Keystones — Lintel

Five GCSE retrieval questions · 26 May 2025 · mathsvault.uk/keystones

1. Number

What is the missing number: 97 + ? = 148

Answer: 51
2. Algebra

Solve: ^x⁄₃ = 2

Answer: x = 6
3. Geometry

Find the distance between (-7, 0) and (12, 3)

Answer: 19.24
4. Ratio

Simplify: 6:18:6

Answer: 1:3:1
5. Statistics

Calculate the mean of: 15, 6, 50, 43, 6, 45, 42, 31

Answer: 29.8

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