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Cornerstone · Grades 3–5 Keystones #1 21 July 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 21 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 2⁄3

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

    Solve: 6x - 6 = 48

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 78 in the ratio 1:2

    Answer: 26 and 52
  5. 5. Statistics Mean

    Calculate the mean of: 5, 28, 35, 48, 8, 29

    Answer: 25.5

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