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Cornerstone · Grades 3–5 Keystones #1 27 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 27 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 4x + 7 = 39

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 2:1:2

    Answer: 54, 27 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 43, 26, 18, 16, 36, 35, 22

    Answer: 28

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