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Cornerstone · Grades 3–5 Keystones #1 19 February 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 19 February 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 6⁄7

    Answer: 69⁄56
  2. 2. Algebra Two-step equations

    Solve: 3x + 7 = 28

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

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:4

    Answer: 12, 24 and 48
  5. 5. Statistics Mean

    Calculate the mean of: 34, 36, 10, 43, 16, 29

    Answer: 28

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