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Cornerstone · Grades 3–5 Keystones #1 10 February 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 10 February 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 4⁄11

    Answer: 10⁄11
  2. 2. Algebra Two-step equations

    Solve: 2x - 8 = 6

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 112 in the ratio 2:3:2

    Answer: 32, 48 and 32
  5. 5. Statistics Mean

    Find the mean of: 11, 6, 16

    Answer: 11

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