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Cornerstone · Grades 3–5 Keystones #1 12 September 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 12 September 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 7⁄11 + 2⁄11

    Answer: 9⁄11
  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 102 in the ratio 1:1:4

    Answer: 17, 17 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 48, 37, 22, 17, 11, 26, 40, 46. Give your answer to 2 decimal places

    Answer: 30.88

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