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Cornerstone · Grades 3–5 Keystones #1 9 August 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 9 August 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄12 + 2⁄12

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 2x - 12 = 10

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 40cm

    Answer: 41cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 3:2:3

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

    Calculate the mean of: 38, 44, 28, 31, 41, 39. Give your answer to 2 decimal places

    Answer: 36.83

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