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Cornerstone · Grades 3–5 Keystones #1 17 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 17 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 11 = 13

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

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 3:1:2

    Answer: 78, 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 40, 39, 31, 31, 19, 9, 29, 24

    Answer: 27.75

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