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Cornerstone · Grades 3–5 Keystones #1 26 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 26 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 2⁄7

    Answer: 20⁄21
  2. 2. Algebra Two-step equations

    Solve: 4x - 8 = 28

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

    Calculate the hypotenuse when a = 9cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 17.49cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 36, 14, 15, 5, 11, 14, 29. Give your answer to 2 decimal places

    Answer: 17.71

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