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Cornerstone · Grades 3–5 Keystones #1 8 October 2015 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2015 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄4

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 34

    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

    Divide 133 in the ratio 2:2:3

    Answer: 38, 38 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 34, 13, 5, 14, 44, 18. Give your answer to 2 decimal places

    Answer: 21.33

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