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Cornerstone · Grades 3–5 Keystones #1 14 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 14 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 3⁄7

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 11 = 71

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

    Calculate the hypotenuse when a = 9cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 1:2

    Answer: 18 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 33, 21, 36, 40, 7, 37

    Answer: 29

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