• 1)

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  • 2)

    q1-p21-june-2014-cie
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    Method 1: ws1-q1-p21-june-2014-cie Method 2: ws2-q1-p21-june-2014-cie

  • 3)

    OCR C3 January 2013 – Q3
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    Part (a):

    Part (b):

  • 4)

    OCR C3 June 2012 – Q1
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