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Cornerstone · Grades 3–5 Keystones #1 30 October 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 35

    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 55 in the ratio 2:2:1

    Answer: 22, 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 31, 18, 46, 36, 19, 47. Give your answer to 2 decimal places

    Answer: 32.83

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