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Cornerstone · Grades 3–5 Keystones #1 17 August 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 17 August 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

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

    Solve: 4x - 15 = 29

    Answer: x = 11
  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 52 in the ratio 2:1:1

    Answer: 26, 13 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 20, 16, 19, 20, 47, 17, 47, 38

    Answer: 28

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