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Cornerstone · Grades 3–5 Keystones #1 25 October 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 25 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄6

    Answer: 4⁄3
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 71

    Answer: x = 11
  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 119 in the ratio 4:1:2

    Answer: 68, 17 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 11, 39, 18, 29, 43, 20, 27. Give your answer to 2 decimal places

    Answer: 26.71

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