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Cornerstone · Grades 3–5 Keystones #1 12 April 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 12 April 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 5⁄7

    Answer: 29⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 11 = 36

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 12cm. Give your answer to 2 decimal places

    Answer: 16.97cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 3:1:2

    Answer: 81, 27 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 48, 10, 46, 45, 14, 27, 38, 40

    Answer: 33.5

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