Keystones — Lintel

Five GCSE retrieval questions · 15 September 2022 · mathsvault.uk/keystones

1. Number

What is the missing number: 63 + ? = 170

Answer: 107
2. Algebra

Solve: ^x⁄₂ = 9.5

Answer: x = 19
3. Geometry

Find the perimeter: hypotenuse = 18cm, one side = 9cm

Answer: 42.6cm
4. Ratio

Find 61% of 325

Answer: 198.25
5. Statistics

Find the range of: -12, 8, -10, 35, -23

Answer: 58

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