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Cornerstone · Grades 3–5 Keystones #1 3 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 3 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 6x - 20 = 58

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 77 in the ratio 4:2:1

    Answer: 44, 22 and 11
  5. 5. Statistics Mean

    Calculate the mean of: 36, 40, 46, 36, 20, 29

    Answer: 34.5

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