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Cornerstone · Grades 3–5 Keystones #1 17 July 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 17 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x - 16 = 44

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Divide 108 in the ratio 1:2:1

    Answer: 27, 54 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 37, 34, 49, 19, 19, 24, 34. Give your answer to 2 decimal places

    Answer: 30.86

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