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# OCR Core 1 Mathematics Tweet

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

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1. Re: Core 1 Mathematics
could you scan the paper please? and post it here? that would be great!! Thanks
2. Re: Core 1 Mathematics
(Original post by nuodai)
If you mean the question where it said 10^p = 0.1, then yes, p = -1.
ye thats the one mean..thanks
3. Re: Core 1 Mathematics
(Original post by Glutamic Acid)
I think when you sub -1 back into the equation you get (-1) + 1 - 1 + 3 = 2.
Nope, you're mixing up your negatives, look:

x³ + x² - x + 3
(-1)³ + (-1)² - (-1) + 3

So you're taking minus 1, which is the same as adding +1.
4. Re: Core 1 Mathematics
ohh damn lost a mark! lol
5. Re: Core 1 Mathematics
The lines were perpendicular
finding the gradients of both are 3 and -1/3 which makes -1
and i made the same maistake as r patel i think lol
THIS PAPER WAS *****G AWFUL. NOTHING FACTORSIED AND EVERYTHING CAME OUT WITH *****G FRACTIONS! NOTHING LIKE THE PAST PAPERS
6. Re: Core 1 Mathematics
:O i got the gradients as 3 and -1/2 (i think) so i sed they werent perpendicular...i think i lost sum more marks now lol
7. Re: Core 1 Mathematics
I thought this paper was a fair one, could have been a lot worse or a lot easier, like the Jan 07 one hehe.
Question 3 was a bastard, was it complete the square?
and the last question I lost 5 marks on.
Think a B/C/D is the likely outcome
8. Re: Core 1 Mathematics
(Original post by Zen90)
I thought this paper was a fair one, could have been a lot worse or a lot easier, like the Jan 07 one hehe.
Question 3 was a bastard, was it complete the square?
and the last question I lost 5 marks on.
Think a B/C/D is the likely outcome
wat was Q 3?
9. Re: Core 1 Mathematics
(Original post by r_patel91)
wat was Q 3?
Hmm I cant remember tbh, minds gone blank
10. Re: Core 1 Mathematics
lol ok
11. Re: Core 1 Mathematics
is the sqrt of 9 plus and minus 3
or just 3
one of maths teachers said jsut 3
and the other said both
lol
12. Re: Core 1 Mathematics
(Original post by nuodai)
Nope, you're mixing up your negatives, look:

x³ + x² - x + 3
(-1)³ + (-1)² - (-1) + 3

So you're taking minus 1, which is the same as adding +1.
Sign, oh well, retake in June.
13. Re: Core 1 Mathematics
question 10 part ii was something like: solve f(x) = -9 and then it was a disguised quadratic wasn't it? i got x=1/2 and x=1 ..... but apparently they're wrong....

what does everyone else think?
14. Re: Core 1 Mathematics
(Original post by deathrow)
is the sqrt of 9 plus and minus 3
or just 3
one of maths teachers said jsut 3
and the other said both
lol
is this for the question wher u had 2 find k?
cos i put 3...because i totally forgot bout the plus and minus!
15. Re: Core 1 Mathematics
It's plus or minus 3, since they both solve the equation. I wrote 3...
16. Re: Core 1 Mathematics
(Original post by biggles123)
question 10 part ii was something like: solve f(x) = -9 and then it was a disguised quadratic wasn't it? i got x=1/2 and x=1 ..... but apparently they're wrong....

what does everyone else think?
ohh ye i think i got x=1/2 for one of them and maybe x=1..vant remember properly tho
17. Re: Core 1 Mathematics
I got x = -1/2, -1.
18. Re: Core 1 Mathematics
(Original post by biggles123)
question 10 part ii was something like: solve f(x) = -9 and then it was a disguised quadratic wasn't it? i got x=1/2 and x=1 ..... but apparently they're wrong....

what does everyone else think?
I multiplied everything by 9 lol
19. Re: Core 1 Mathematics
(Original post by Glutamic Acid)
I got x = -1/2, -1.
oh ye...i think i mitev got that! i think i got all the same answers as u lol
20. Re: Core 1 Mathematics
(Original post by biggles123)
question 10 part ii was something like: solve f(x) = -9 and then it was a disguised quadratic wasn't it? i got x=1/2 and x=1 ..... but apparently they're wrong....

what does everyone else think?
Thats right, thats what i got.
Did you substitute x^3 as y, then multiply by y to get rid of it underneath. Then got 1/8 and 1. Thats what i did.
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