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Cornerstone · Grades 3–5 Keystones #1 8 February 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 8 February 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄12 + 1⁄12

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x + 8 = 28

    Answer: x = 10
  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 144 in the ratio 2:1:3

    Answer: 48, 24 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 9, 24, 28, 43, 39, 31, 43

    Answer: 31

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