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Cornerstone · Grades 3–5 Keystones #1 18 February 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 February 2022 · mathsvault.uk/keystones

  1. 1. Number

    Add: 3⁄5 + 3⁄7

    Answer: 36⁄35
  2. 2. Algebra

    Solve: x + 13 = 31

    Answer: x = 18
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio

    Calculate 25% of 47

    Answer: 11.75
  5. 5. Statistics

    Calculate the mean of: 25, 35, 40, 40, 12, 43

    Answer: 32.5

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