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Cornerstone · Grades 3–5 Keystones #1 10 December 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 10 December 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄5

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 6x - 19 = 59

    Answer: x = 13
  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 2:1

    Answer: 24 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 14, 11, 21, 49, 18, 13, 6, 47. Give your answer to 2 decimal places

    Answer: 22.38

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