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Cornerstone · Grades 3–5 Keystones #1 9 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 9 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 4⁄6

    Answer: 17⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 24

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 152 in the ratio 1:1:2

    Answer: 38, 38 and 76
  5. 5. Statistics Mean

    Calculate the mean of: 33, 16, 26, 35, 28, 12, 19, 49

    Answer: 27.25

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