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# Linked pair pilot - Applications of Maths (Edexcel) 24/05/2016

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1. (Original post by amkay)
This is wht I got:
Let odd numbers be:
2x+1 and 2m+1
(2x+1)(2m+1) = 4mx + 2m + 2x + 1
= 2(2mx + m + x) + 1
Therefore, it is odd because any number x2 + 1 is odd.
your right I think - i put it as (n+1) (n+1) which is wrong isn't it because n could be an odd number. I forgot 2n will always be even. Hopefully that was the only question I dropped all the marks in
2. Dw it was only a couple of marks
3. (Original post by jayg123)
Personally found it alright - some hard questions like the last one about the vectors and the circle theorm, but other than that thought the rest was fine. Loads of people came out the exam saying it was really hard ( most clever people). How did people do the odd proof quesiton
i did

=(2n+1)(2n+1)
= 4nsquared + 4n +1

there was a * which means quality of written communication so i said:
4n is a multiple of 4 therefore even
and 4n squared is therefore also even
even + even = even
and the +1 at the end makes it odd
4. Yh, but didn't it say 'any' odd number which would mean it can't be the same two odd numbers
5. (Original post by amkay)
Yh, but didn't it say 'any' odd number which would mean it can't be the same two odd numbers
oh **** did it say consecutive. i guess thres some more marks down the drain lol

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