Keystones — Lintel

Five GCSE retrieval questions · 17 October 2023 · mathsvault.uk/keystones

1. Number

Simplify: x⁵ × x⁷

Answer: x¹²
2. Algebra

Solve: 6x = 60

Answer: x = 10
3. Geometry

Calculate the perimeter of a right triangle with sides 7cm and 9cm

Answer: 27.4cm
4. Ratio

Calculate 17.9% of 363

Answer: 64.98
5. Statistics

Find the range of: -14, 36, 33, -1, -12

Answer: 50

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