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Cornerstone · Grades 3–5 Keystones #1 8 June 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 8 June 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 4⁄8

    Answer: 19⁄14
  2. 2. Algebra Two-step equations

    Solve: 3x - 8 = 19

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 133 in the ratio 1:3:3

    Answer: 19, 57 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 16, 49, 12, 23, 49, 26, 7, 37. Give your answer to 2 decimal places

    Answer: 27.38

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