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Cornerstone · Grades 3–5 Keystones #1 9 May 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 May 2021 · mathsvault.uk/keystones

  1. 1. Number

    Add: 1⁄6 + 3⁄7

    Answer: 25⁄42
  2. 2. Algebra

    Solve: 9x = 117

    Answer: x = 13
  3. 3. Geometry

    Opposite = 9cm, hypotenuse = 10.4cm. Find the angle

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

    Simplify the ratio 24:28

    Answer: 6:7
  5. 5. Statistics

    Find the range of: 22, 36, 21, 31, 15

    Answer: 21

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