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Cornerstone · Grades 3–5 Keystones #1 23 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 23 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 2⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 0

    Answer: x = 10
  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

    Divide 300 in the ratio 2:2:1

    Answer: 120, 120 and 60
  5. 5. Statistics Mean

    Find the mean of: 15, 10, 4, 11

    Answer: 10

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