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

  1. 1. Number Adding fractions

    Calculate: 1⁄11 + 9⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 68

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 39 in the ratio 1:2

    Answer: 13 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 36, 7, 8, 42, 5, 27, 10. Give your answer to 2 decimal places

    Answer: 19.29

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