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Cornerstone · Grades 3–5 Keystones #1 19 October 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 19 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄11 + 8⁄11

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

    Solve: 5x - 7 = 68

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Share 33 in the ratio 1:2

    Answer: 11 and 22
  5. 5. Statistics Mean

    Find the mean of: 7, 19, 16

    Answer: 14

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