Q&A Bank Part 1 Q 1.35

Discussion in 'CT1' started by jlstroh, Jul 8, 2016.

  1. jlstroh

    jlstroh Member

    Why is the solution done in months instead of years? Why do I not get to the same answer when I work in years with an effective interest rate of 12.6825% per annum?
     
  2. John Lee

    John Lee ActEd Tutor Staff Member

    Because it's also a valid method and has a nice 1% PCM interest rate to use.

    You'd have to give me your working before I can answer why you haven't got the right answer with the correct annual rate of interest.
     
  3. jlstroh

    jlstroh Member

    Thanks John. Here is my working:
    PV = 1000a6 ̅|+ 400a4 ̅|* V^6 + 2000V^10 with i = 12.6825%
    = 4033.146749 + 585.0622611 + 605.9897214
    = 5224.20 instead of 5487
     
  4. jlstroh

    jlstroh Member

    I think I know where I made a mistake. I should've divided by i(12) = 12% and not i = 12.6825%, because the interest is converted monthly. :)
     
  5. John Lee

    John Lee ActEd Tutor Staff Member

    Yes that would be it.
     

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