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Cornerstone · Grades 3–5 Keystones #1 19 March 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 March 2021 · mathsvault.uk/keystones

  1. 1. Number

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra

    Factorise: 10x + 14

    Answer: 2(5x + 7)
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 15cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify the ratio 21:9

    Answer: 7:3
  5. 5. Statistics

    Calculate the mean of: 18, 26, 25, 50, 11, 40, 17, 23

    Answer: 26.3

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