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Cornerstone · Grades 3–5 Keystones #1 25 August 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 25 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄9 + 1⁄9

    Answer: 4⁄9
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 51

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 34, 6, 46, 31, 29, 41, 16, 31

    Answer: 29.25

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