• 1)

    Edexcel C1 June 2013 – Q4
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  • 2)

    Edexcel C1 June 2011 – Q5
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    Parts (a) and (b):
    Part (c):
  • 3)

    Edexcel C1 June 2009 – Q7
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    Parts (a) and (b):

    Part (c):