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Cornerstone · Grades 3–5 Keystones #1 31 July 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 31 July 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 1⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 39

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 2:3:1

    Answer: 46, 69 and 23
  5. 5. Statistics Mean

    Calculate the mean of: 14, 11, 11, 34, 26, 50, 11. Give your answer to 2 decimal places

    Answer: 22.43

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