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Cornerstone · Grades 3–5 Keystones #1 28 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 28 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄11 + 7⁄11

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

    Solve: 6x + 12 = 66

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

    Calculate the hypotenuse when a = 12cm and b = 5cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 189 in the ratio 4:2:1

    Answer: 108, 54 and 27
  5. 5. Statistics Mean

    Calculate the mean of: 43, 30, 15, 26, 45, 40. Give your answer to 2 decimal places

    Answer: 33.17

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