Past paper solutions - WJEC C1 May 2015 :

WJEC C1 May 2015 past paper solutions
Written solutions and methodology for the C1 paper (unofficial), click on image to download.

*** Please note small error as pointed out in the comments below (Thanks) ***

thumbnail of C1 May 2015

The questions to this paper can be found here

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WJEC C1 May 2015 solutions
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4 thoughts on “WJEC C1 May 2015 solutions

  • March 28, 2016 at 5:07 pm

    Great work.

    Small error in Q5(a) of C1 2015 – You have missed the second -10k, which would give the correct answer of -25/4 (same for (b)).


    • March 29, 2016 at 1:52 pm

      Thanks for pointing out the error Stephen. Much appreciated.

  • April 11, 2016 at 6:49 pm

    small mistake Q2 b: should be (8√14)/4 = 2√14

    moot point but personally in Q3b I’d change your ‘x’ into ‘a’

    Q4b, you’ve missed a root.
    x-3= ±15/2
    ⇒ x=10.5 or -4.5

    Q6a should be ‘7x^2’ as 3rd term

    Please forgive me for saying last line of Q10 is messy
    x = 40 & (dee 2 y by dee x squared) = 3200/(40^3) ≻ 0 ⇒ ∃ minimum
    ∴ Min value of L = 40 + (1600/40) = 40 + 40 = 80m
    You’ve made a great resource :)

    • April 12, 2016 at 1:09 pm

      Thanks Jilly. It appears that I may have rushed these solutions a little bit!
      I’ll endeavour to put up a “clean” copy when I have time.

      It’s great to hear that these resources are useful, makes the work worthwhile :-)


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