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Cornerstone · Grades 3–5 Keystones #1 29 July 2019 Skills week 1 of 7
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Five GCSE retrieval questions · 29 July 2019 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 2⁄3

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

    Solve: 3x + 12 = 27

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 133 in the ratio 4:3

    Answer: 76 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 27, 37, 48, 24, 36, 20, 28, 35

    Answer: 31.9

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