Keystones — Cornerstone

Five GCSE retrieval questions · 22 September 2024 · mathsvault.uk/keystones

1. Number

Calculate: ⁵⁄₇ + ¹⁄₇

Answer: ⁶⁄₇
2. Algebra

Solve: x + 6 = 25

Answer: x = 19
3. Geometry

Calculate the hypotenuse when a = 8cm and b = 7cm

Answer: 10.63cm
4. Ratio

Simplify: 4:8:10

Answer: 2:4:5
5. Statistics

Calculate the mean of: 15, 16, 10, 41, 50, 35

Answer: 27.8

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