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Cornerstone · Grades 3–5 Keystones #1 31 March 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 31 March 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 9⁄11 + 1⁄11

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

    Solve: 2x - 11 = -1

    Answer: x = 5
  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 115 in the ratio 1:1:3

    Answer: 23, 23 and 69
  5. 5. Statistics Mean

    Calculate the mean of: 48, 17, 6, 46, 41, 34, 26. Give your answer to 2 decimal places

    Answer: 31.14

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