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AQA maths core 1, 13th May 2015

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Reply 40
Avatar for laur a
laur a
3
Original post by DexterMabel123
i got b =7


SAME!! I got so confused and went back to it at the end, Pythagoras!
Original post by JNicko
Yeah, I got this

Then the triangle was 180/5, so the area was 180/5 - 108/5 = 72/5


trapezium mate

trapezium = 54

54 - 108/5 = 162/5 or 32.4
I found the cylinder question quite challenging but the rest of the exam wasn't bad.
Reply 43
Avatar for JNicko
JNicko
1
Original post by laur a
i got the 108/5 one too!! What did everyone get for the chord one where you had to find the shortest distance?


I got 7, so did 5 people I spoke to after the exam, so I'd say 7 is a safe bet
Fairly confident of every question apart from the first 5 marks on the cylinder (i know what i did wrong now).
Will hopefully only lose a couple of marks on all the other questions, so i should get an A.
Waiting for an unofficial mark scheme :smile:
Original post by JNicko
k < 4, k > -4/9


I got that but I just realised that I put 4/9 instead of -4/9. What a stupid mark to lose there. I got all the workings correct as well but I just forgot to add the minus.


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Reply 46
Avatar for laur a
laur a
3
What did everyone get for the third question when you solve two equations sim. to find the coordinate of k or something
Reply 47
Avatar for SBurn98
SBurn98
1
Chord was 7 was Pythagoras, root of (2root5)^2 -1^2 which is root 49 so shortest distance is 7
5 root 2 squared - 1 squared = root 49
which was then 7
Reply 49
Avatar for JNicko
JNicko
1
Original post by Hellohello1237
trapezium mate

trapezium = 54

54 - 108/5 = 162/5 or 32.4


Completely forgot about that, guess I rushed it
Original post by SBurn98
Chord was 7 was Pythagoras, root of (2root5)^2 -1^2 which is root 49 so shortest distance is 7


yeyyy i got 7 too
Reply 51
Avatar for JNicko
JNicko
1
Original post by laur a
What did everyone get for the third question when you solve two equations sim. to find the coordinate of k or something


The positive value for K was 4 I think
So on a scale of 1-10, 10 being the hardest; how hard did people find the test?
i did 2(square root of 5) - QP^2 which = to 20-4=16
square root of 16=4
Reply 54
Avatar for Sguest16
Sguest16
What did everyone get for the integration question?!?
Reply 55
Avatar for hndara
hndara
5
For the integration and finding the area of shaded part i forgot to simplify from 324/10 to 162/5- will I lose a mark cos I can't remember whether they specifically asked for it in the simplest form
Solid 9.
Original post by chantsmariexx
So on a scale of 1-10, 10 being the hardest; how hard did people find the test?
Reply 57
Avatar for JNicko
JNicko
1
Original post by chantsmariexx
So on a scale of 1-10, 10 being the hardest; how hard did people find the test?


The paper was great apart from the cyl question

Think the grade boundries will be rather low this year 61 for an A i'd say
1) -5/3
coordinate A (9, -4)

2) 7+ √15

3) y=-10x -4
108/5
162/5

6) show something
r= 4
second derivative = -12pi so it's a max value

8) -4/9 < k < 4


Dunno what question number
Chord to centre = 7
(edited 8 years ago)
Original post by chantsmariexx
So on a scale of 1-10, 10 being the hardest; how hard did people find the test?


a good 8

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