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Cornerstone · Grades 3–5 Keystones #1 17 August 2019 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 August 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 3⁄7

    Answer: 23⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x + 13 = 61

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 4:3:2

    Answer: 56, 42 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 13, 49, 16, 10, 40, 50, 35, 23

    Answer: 29.5

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