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Cornerstone · Grades 3–5 Keystones #1 30 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 30 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 5⁄7

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 2x - 9 = 19

    Answer: x = 14
  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 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 23, 38, 27, 30, 36, 19, 43. Give your answer to 2 decimal places

    Answer: 30.86

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