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Cornerstone · Grades 3–5 Keystones #1 18 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 18 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x - 6 = 24

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 114 in the ratio 1:4:1

    Answer: 19, 76 and 19
  5. 5. Statistics Mean

    Calculate the mean of: 28, 29, 50, 17, 19, 30. Give your answer to 2 decimal places

    Answer: 28.83

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