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# AQA maths core 1, 13th May 2015 watch

1. (Original post by tanyapotter)
yeah, i'll hopefully get the two marks because i got the area of the trapezium (54?) and took away "my" 108/5 so hopefully i've only lost the one mark for the final answer
fingers crossed! i hope examiners take care with their marking and actually look at method marks - i'm relying on them so much to get 68/75!!
Messed it up like you. I done 54 - 22 = 32

How many marks do you think we'll drop considering part a) was 5 marks and part b) to find the actual shaded area was 3 marks?
2. (Original post by tanyapotter)
Attachment 397923

this was what it said in the june 2014 mark scheme which led me to believe that i could s scavenge a mark out of that last question - but i've only seen this disclaimer come up in last year's paper and never before - do you think it applies with this question too?

this question seems to apply that you factorised correctly but then got the CVs wrong - i couldn't factorise it in the first place. do you think it could still apply to me?
I did the same as you I think! It's annoying because I know exactly how to do inequalities but I'm terrible at factorising. I couldn't factorise it so I used the quadratic formula and got ridiculous numbers. I knew they were wrong but I still carried on with the question in hopes I'd get marks for the graph with the values I got.
3. (Original post by SeanHarvey)
Messed it up like you. I done 54 - 22 = 32

How many marks do you think we'll drop considering part a) was 5 marks and part b) to find the actual shaded area was 3 marks?
i personally probably dropped 2 from the first part and 1 from the second
4. Thanks mate but FOR **** SAKE... I stopped inputting values at +2 thinking that it'd just carry on downwards arghhhhhhh.
5. The highest mark needed for an A is always 60=80%. After reading a lot of comments, the A boundary could go as low as 55. In my core 4 mock, the A mark was 55 and I got 63 which was "technically" an A*.

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6. (Original post by Signorina)
I did the same as you I think! It's annoying because I know exactly how to do inequalities but I'm terrible at factorising. I couldn't factorise it so I used the quadratic formula and got ridiculous numbers. I knew they were wrong but I still carried on with the question in hopes I'd get marks for the graph with the values I got.
fingers crossed that we'll get one mark!! i can't believe i got the cylinder question correct yet couldn't factorise a simple quadratic!!! i am so ashamed of myself
7. (Original post by FS492)
To be honest the exam was really easy and it wasn't 'the hardest of all time' ... coming from someone who was resetting I can honestly say that this exam was a breeze with just a less common question (cylinder) included. The grade boundaries should be high 62/63 = 80Ums... Last years paper was easy too but I messed up because I never revised (last year). The exams may seem harder because they no longer spoon feed us by saying "find this ..." instead people have to use their brains to work out what is needed and then how to do it. If you haven't done well there is no harm in resetting in Y13 its a doodle now
tbh i dont see this years paper grade boudnaries being same as june 2014 which was 62 for a A which was much easier then this years paper... grade boundariess should go down due to cyclinder question and to a somewhat extent surd question
8. (Original post by jakecre8)
The highest mark needed for an A is always 60=80%. After reading a lot of comments, the A boundary could go as low as 55. In my core 4 mock, the A mark was 55 and I got 63 which was "technically" an A*.

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That's not true mate. It's very often higher than 60, check the AQA website
9. Cylinder question cost me a grade. **** sake.
10. (Original post by tanyapotter)
fingers crossed that we'll get one mark!! i can't believe i got the cylinder question correct yet couldn't factorise a simple quadratic!!! i am so ashamed of myself
Yeah hopefully! I spent the final 20 minutes of the exam trying to factorise it. I'm so annoyed because the reason I couldn't factorise it was because I thought 3x4=16. how stupid. very ashamed because a year 9 probably could have managed to factorise it.
11. The two issues I had was not specifically stating that n=7 (on the chord question) and not simplifying h in terms of r, (I still got it right but it wasn't the simplified version) do you think I lost both marks?
12. (Original post by Heffalump .)
The two issues I had was not specifically stating that n=7 (on the chord question) and not simplifying h in terms of r, (I still got it right but it wasn't the simplified version) do you think I lost both marks?
you didn't have to state n=7 on the chord question anyway, right? you only had to state it for the surd question, which was also 7

and i don't know if you'd lose any marks for not simplifying - it was only worth 3 marks. i think one would be to find an expression for the surface area, another to put h to one side and the final one perhaps to simplify? but it could also have been to just state something, idk
13. Completely different to every other past paper.
14. Okay so on the cylinder question, I had no idea. But when I differentiated it I took of the Pi and r (I know stupid) but I still go to the stationary point to be 4 and that it was a maximum point. Do you guys think I could get at least on mark? 😂

I forgot you had to 2 by 2 to get one. 50-1=49 blah blah I did 50-4= 46
Silly mistakes
15. anyone think an A could be higher than 60, or is the general consensus 58-60 for an A?
16. (Original post by tanyapotter)
you didn't have to state n=7 on the chord question anyway, right? you only had to state it for the surd question, which was also 7

and i don't know if you'd lose any marks for not simplifying - it was only worth 3 marks. i think one would be to find an expression for the surface area, another to put h to one side and the final one perhaps to simplify? but it could also have been to just state something, idk
Oh yeah, it must have been the surd question I didn't do it for then.. >
yeah I probably lost a mark for not simplifying.. ah well, only two marks I guess... still so annoying losing marks over such minor things >:O
17. (Original post by Signorina)
I did the same as you I think! It's annoying because I know exactly how to do inequalities but I'm terrible at factorising. I couldn't factorise it so I used the quadratic formula and got ridiculous numbers. I knew they were wrong but I still carried on with the question in hopes I'd get marks for the graph with the values I got.
this might be too late but useful in future. to factorise a large quadratic as such as the one belowthis is what u should

7k 2 - 48k + 80

7x80=560

double 7 and half 80
14 and 40
repeat
28 and 20
derefore -28 and -20 are ur factors... then u should do rest easily
all ur doing is halfing and doubling if u still cant find factor then start with 1 and 560 but it wont work in this case, i used this method for todays exam found the factors quickly i think deres also a youtube vid about it
18. (Original post by Heffalump .)
Oh yeah, it must have been the surd question I didn't do it for then.. >
yeah I probably lost a mark for not simplifying.. ah well, only two marks I guess... still so annoying losing marks over such minor things >:O
i mean, it could have been one mark for just writing 2pir + pir^2 is the total surface area, then one mark for equating it to 48pi, then the last for rearranging? idk
19. can someone confirm that d2y/dx^2
was 24-3pir if yes how does this get -12pi?
if no can u go through the process
r=4 thanks
20. (Original post by r-star)
this might be too late but useful in future. to factorise a large quadratic as such as the one belowthis is what u should

7k 2 - 48k + 80

7x80=560

double 7 and half 80
14 and 40
repeat
28 and 20
derefore -28 and -20 are ur factors... then u should do rest easily
all ur doing is halfing and doubling if u still cant find factor then start with 1 and 560 but it wont work in this case, i used this method for todays exam found the factors quickly i think deres also a youtube vid about it
Oh that sounds much quicker! I normally already use the method of multiplying coeff w last term but I do struggle trying to find factors quickly without a calculator. If i was in the exam i would have started with 1 and 560 and worked my way up from there... i'd have taken sooo long to found the answer lol. but your method seems good and much quicker!! thanks for the tip ill remember it

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