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Cornerstone · Grades 3–5 Keystones #1 12 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 12 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 3⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x - 20 = 34

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 154 in the ratio 1:4:2

    Answer: 22, 88 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 34, 30, 45, 44, 15, 20. Give your answer to 2 decimal places

    Answer: 31.33

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