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# AQA maths core 1, 13th May 2015 watch

1. Wait, do I have to state "critical values are 4 and -9/4"? I just did the factorising and sign diagram them -9/4<k<4
Do i lose a mark for that?

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2. For the area of shaded region question this is what I got:

area of trapezium= 54

area under curve= 108/5

area of shaded region= 54-108/5 = 162/5

3. (Original post by C0balt)
Wait, do I have to state "critical values are 4 and -9/4"? I just did the factorising and sign diagram them -9/4<k<4
Do i lose a mark for that?

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In the majority of mark schemes, it says "Take their final line as their complete answer" i.e. your inequality. I presume this years will be the same so you should be fine if you got the final inequality right.
4. (Original post by KB_97)
For the area of shaded region question this is what I got:

area of trapezium= 54

area under curve= 108/5

area of shaded region= 54-108/5 = 162/5

That's what I got

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5. Yeah agreed, Questions 1-5, 7 were great, quite a few things in there to catch you out but overall quite a reasonable paper. I only answered the differentiation part of Q6, couldn't work out the expression
6. (Original post by 2014_GCSE)
In the majority of mark schemes, it says "Take their final line as their complete answer" i.e. your inequality. I presume this years will be the same so you should be fine if you got the final inequality right.
Thank god this freaked me out lol

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Attached Images

7. (Original post by C0balt)
Wait, do I have to state "critical values are 4 and -9/4"? I just did the factorising and sign diagram them -9/4<k<4
Do i lose a mark for that?

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Depends how many marks it was worth. I think it was 4 marks. Did you label your critical values on your graph because you might get a mark for that if you haven't stated them anywhere else. You should also get a mark for factorising so it's best to show all working
8. (Original post by KB_97)
Depends how many marks it was worth. I think it was 4 marks. Did you label your critical values on your graph because you might get a mark for that if you haven't stated them anywhere else. You should also get a mark for factorising so it's best to show all working
This is exactly what I wrote.

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Attached Images

9. (Original post by C0balt)
Thank god this freaked me out lol

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Yeah, don't worry, I've definitely seen that C.V thing a lot, but they definitely don't mind giving you full marks as long as you got your final inequality right.
Did anyone get k = 8 or -8 for the last question on solving inequalities?
In the final question? I got k= 4 and k= -9/4 or something similar I think.
11. (Original post by 2014_GCSE)
Yeah, don't worry, I've definitely seen that C.V thing a lot, but they definitely don't mind giving you full marks as long as you got your final inequality right.
Phew
Still one mark and should give me 100UMS anyway seeing how much flak this cylinder is getting lol Thank god

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12. For the question where you had to draw the graph of y=x^2(x-3) did you guys get an N shaped graph crossing y axis at 0 and crossing x axis at 3 and 0 ??
13. (Original post by KB_97)
For the question where you had to draw the graph of y=x^2(x-3) did you guys get an N shaped graph crossing y axis at 0 and crossing x axis at 3 and 0 ??
Yes the stationary point was at (0,0) and crossed at (3,0)

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14. (Original post by C0balt)
This is exactly what I wrote.

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Yup. You're fine. Don't think you're missing anything. Well done! Hope someone puts up and unofficial mark scheme soon
15. (Original post by KB_97)
Yup. You're fine. Don't think you're missing anything. Well done! Hope someone puts up and unofficial mark scheme soon
Great
http://www.thestudentroom.co.uk/show....php?t=3323079
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16. (Original post by C0balt)
Phew
Still one mark and should give me 100UMS anyway seeing how much flak this cylinder is getting lol Thank god

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Not gonna lie that question threw me off a little bit but you just had to stay calm. And the format of the question was good so even if you guessed half of it (which I did) you could tell if you were doing it right or not bc if u were u would get to the final answer they stated.
17. Thanks
18. (Original post by KB_97)
Not gonna lie that question threw me off a little bit but you just had to stay calm. And the format of the question was good so even if you guessed half of it (which I did) you could tell if you were doing it right or not bc if u were u would get to the final answer they stated.
Yeah I think so
I personally liked the cylinder question haha I love those algebraic ones

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19. Any predictions on what mark will be required for 100 UMS?
20. (Original post by catalyst_777)
Any predictions on what mark will be required for 100 UMS?
73 is my guess

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