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Cornerstone · Grades 3–5 Keystones #1 9 November 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 November 2023 · mathsvault.uk/keystones

  1. 1. Number

    Add: 3⁄6 + 1⁄5

    Answer: 7⁄10
  2. 2. Algebra

    Factorise: 21x + 18

    Answer: 3(7x + 6)
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 10cm

    Answer: 10.77cm
  4. 4. Ratio

    Simplify the ratio 6:4

    Answer: 3:2
  5. 5. Statistics

    Find the range of: 31, 25, 9, 19, 15

    Answer: 22

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