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Cornerstone · Grades 3–5 Keystones #1 20 October 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 20 October 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 1⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 74

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 1:2

    Answer: 10 and 20
  5. 5. Statistics Mean

    Calculate the mean of: 15, 28, 35, 22, 31, 12, 41. Give your answer to 2 decimal places

    Answer: 26.29

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