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Cornerstone · Grades 3–5 Keystones #1 25 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 25 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 2⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 8 = 16

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:4

    Answer: 9 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 20, 40, 28, 9, 47, 37, 11. Give your answer to 2 decimal places

    Answer: 27.43

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