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Cornerstone · Grades 3–5 Keystones #1 26 July 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 26 July 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 5x - 5 = 35

    Answer: x = 8
  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 60 in the ratio 2:3:1

    Answer: 20, 30 and 10
  5. 5. Statistics Mean

    Find the mean of: 15, 17, 10, 5, 3

    Answer: 10

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