# C1 January 2002?

Just done some questions from this paper but can't find the mark scheme anywhere! If someone could send it to me of tell me where I could find it i would be really grateful.
(edited 11 years ago)
Original post by lamp010101
Just done some questions from this paper but can't find the mark scheme anywhere! If someone could send it to me of tell me where I could find it i would be really grateful.

An exam board may help
Also do you mean P1?
(edited 11 years ago)
Original post by lamp010101
Just done some questions from this paper but can't find the mark scheme anywhere! If someone could send it to me of tell me where I could find it i would be really grateful.

It's not April the 1st is it?

The first C1 papers were in Jan 2005.
Original post by lamp010101
Just done some questions from this paper but can't find the mark scheme anywhere! If someone could send it to me of tell me where I could find it i would be really grateful.

If you post it up I'll do it and post up answers, it would be welcome procrastination :P
Thank you sorry for the late reply, it was really just one question I was stuck on:

6. Initially the number of fish in a lake is 500 000. The population is then modelled by the recurrence
relation un + 1 = 1.05un d, u0 = 500 000.
In this relation un is the number of fish in the lake after n years and d is the number of fish which
are caught each year.
Given that d = 15 000,
(a) calculate u1 , u2 and u3 and comment briefly on your results. (3)
Given that d = 100 000,
(b) show that the population of fish dies out during the sixth year. (3)
(c) Find the value of d which would leave the population each year unchanged. (2)

It was mainly part b which I thought was odd, I thought maybe I should just work out u1 u2 u3 untill u6 but that just seems like too much work for a c1 paper for 3 marks! Thank you for any help!
This style of question is too old , but anyways i am gonna show you one way of getting the answer

Take the D=100 000

type 100 000 into your calculator and press Equal

then use the formula as : 1.05(500000)-(Ans) --> and that answer is your 100 000

Now press = 6 times to get the sixth year U6

you will get -10143.46(2dp)

hope that is clear.
Original post by lamp010101
but that just seems like too much work for a c1 paper for 3 marks! Thank you for any help!

I'm still fascinated by the idea that you think that you're doing a C1 paper from 2002, since the first ones were in January 2005. Is it a P1 paper? If so, the specification was quite different.
Thank you, well I was doing a paper which had questions from a range of past papers, next to this one it said January 2002 c1 so I just assumed it was, hopefully nothing like this will come up on Monday, especially seeing as it's non calculator!
guys can someone do part (d) thanks in advance
Original post by Anan Tahseen

This thread is 10 years old and that spec isn't taught any more - please don't resurrect old threads. Thanks