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

  1. 1. Number Adding fractions

    Add: 4⁄7 + 1⁄5

    Answer: 27⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 36

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 2:1:3

    Answer: 48, 24 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 7, 29, 19, 10, 7, 5, 40. Give your answer to 2 decimal places

    Answer: 16.71

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