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Cornerstone · Grades 3–5 Keystones #1 8 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 8 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 2⁄11

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

    Solve: 5x + 12 = 67

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 1:2

    Answer: 20 and 40
  5. 5. Statistics Mean

    Calculate the mean of: 26, 22, 31, 11, 8, 40, 5. Give your answer to 2 decimal places

    Answer: 20.43

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