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Cornerstone · Grades 3–5 Keystones #1 9 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 9 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 3⁄8

    Answer: 7⁄8
  2. 2. Algebra Two-step equations

    Solve: 3x - 6 = 27

    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 96 in the ratio 1:2:1

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

    Calculate the mean of: 28, 50, 30, 20, 44, 25, 37. Give your answer to 2 decimal places

    Answer: 33.43

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