Turn on thread page Beta
 You are Here: Home >< Maths

# AQA maths core 1, 13th May 2015 watch

1. (Original post by tadit)
For the circle equation question, how were the two possible values for k found? I subbed in the coordinates of P(4,k) into the circle equation (x+1)^2+(y-3)^2=50 and got a quadratic like x^2-6x-24=0 which I had to use the quadratic equation to get something like 3 plus or minus root 33... it seems some people got 8 or -2 or something
So the question said x = 4 and y = k

That turns into

(k - 3)^2 = 25

then

k = 3 + 5 and 3 - 5

so yeah -2 or 8
2. Anyone remember the values they got for k (for the circle question)? it's the only question I'm unsure about..
3. (Original post by Rajina.0)
YES THATS WHAT I GOT TOO!
That cylinder question was disgusting.
It wasn't that hard if you knew the area and surface area of a cylinder.
4. (Original post by Heffalump .)
the first bit was 108/5, not 163/5.. the final answer was 162/5
yeah, that's what i meant, sorry
I got 107/5 for the first bit
and the. 54-107/5 = 163/5 for the second bit

i messed up in some arithmetic in the first part of the question and it followed through - would i be penalised twice? how many marks would i lose in total?
5. i got k = -2 and 8 as well
6. (Original post by asunny1998)
How did everyone find the paper?
On the desk like everyone else
7. Can you explain 5.c) ? (It's really bugging me)
8. Anyone have any idea was 100UMS is going to be for this?
9. (Original post by DexterMabel123)
i got 21.6 for the integration question anyone get this?
I did!! It was that or 21.4 😆
10. (Original post by Programming_Nerd)
So the question said x = 4 and y = k

That turns into

(k - 3)^2 = 25

then

k = 3 + 5 and 3 - 5

so yeah -2 or 8
How many marks was this worth?
11. (Original post by tanyapotter)
yeah, that's what i meant, sorry
I got 107/5 for the first bit
and the. 54-107/5 = 163/5 for the second bit

i messed up in some arithmetic in the first part of the question and it followed through - would i be penalised twice? how many marks would i lose in total?
I messed up too, by using 98/5 instead of 108/5. I'm sure there will be method marks/follow through, but we will lose accuracy marks.

(Original post by Hexaneandheels)
Anyone have any idea was 100UMS is going to be for this?
Probably 73-75
12. I looked there too, couldn't find anything
13. I got y = -4 and x = 9 :/
(Original post by Hibzish)
I tried the simultaneous equation so many times i got y=300 or sumthing it was the hardest paper i ever sat

Posted from TSR Mobile
14. (Original post by Programming_Nerd)
So the question said x = 4 and y = k

That turns into

(k - 3)^2 = 25

then

k = 3 + 5 and 3 - 5

so yeah -2 or 8
Oh I did 34-50=-24 but its -16... clever me. cheers though
15. (Original post by tanyapotter)
yeah, that's what i meant, sorry
I got 107/5 for the first bit
and the. 54-107/5 = 163/5 for the second bit

i messed up in some arithmetic in the first part of the question and it followed through - would i be penalised twice? how many marks would i lose in total?
You would only lose one, as it's an error carried forward
16. Hopefully got 100 UMS, the cylinder question really wasn't that bad. If you didn't know the equation you could have used some common sense and seen that the circumference of a circle is 2πr and so you then times that by the height to get the surface area so it is 2πrh.

Obviously then you can do what other people have said and do 48π = 2πrh + πr^2
17. (Original post by Heffalump .)
How many marks was this worth?
I think it was 3
18. I got 112/5. 108/5 was only the integrated bit. You had to take it away from the trapezium
19. (Original post by Heffalump .)
Are you sure it was -9/4.. I thought it was -4/9..
Yeah you're right I put that on the paper but copied it wrong!
20. (Original post by RhysKirkwood)
You would only lose one, as it's an error carried forward
really? omg that's great. thank you!

Reply
Submit reply
Turn on thread page Beta

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 27, 2016
Today on TSR

### A-Level OCR Biology Unofficial Markscheme

Find out how you've done here

### 1,070

students online now

Exam discussions

Poll
Useful resources

## Make your revision easier

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.