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Cornerstone · Grades 3–5 Keystones #1 24 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 24 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 2⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 15 = 20

    Answer: x = 7
  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

    Share 36 in the ratio 1:3

    Answer: 9 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 32, 20, 39, 17, 5, 29, 44. Give your answer to 2 decimal places

    Answer: 26.57

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