OL Maths paper 2

ihavequestions · 14-06-2010 04:53PM

Channing Sticky Coffin wrote: »

I've bolded the answers I have that are different to yours...

2b iv I got 4x+3y+5=0
5b iii I got 8/17 you've put in (A/O) instead of (A/H)
5b iv I got 240/289, what you've done there is got 2 sin theta instead of sin 2theta
5c ii I got 39m, I think this came to something like 38.467, a lot of people rounded down to 38 after looking at the .4, but it should have been rounded upwards to 39.
6b iv I got 1/2, I'm not too sure if i had my methodology correct here though

Ah NO! Those are such silly mistakes

:( I think my 6b iv is right, I thought hard about it!! Hopefully I wont be marked too harshly for them mistakes....though my answers are wrong LOL . I guess thats number 5 which won't be counted! I'm glad I did all the Q's :cool:

Shanotheslayer wrote: »

Did you round down on part B? other then that I think I got all them!

Did I round down in Q5 is it ? When I said 38 ? Ya its ment to be 39

But wooooo go us

( assuming that the 3 of us have'nt all made the same mistakes and gotten everything wrong

)

RyanK · 14-06-2010 05:29PM

ihavequestions wrote: »

Thought it was very easy! Here are my answers did anyone get the same?

1 (a) (i) 72 (ii) 324
(b) (i) 195 (ii) 2.5%
(c) (i) 121.5 pi (ii) 3.4

2 (a) 17
(b) (i) 0=0 (ii) (5,0) (iv) 2x+3y+5=0
(c) (i) 10 (ii) (-13,19)

3 (a)(i) 13 (ii) x^2+y^2=169
(b)(i) (1,-4) (ii) (-1,4)
(c)(i) (0,7) r=10 (ii) -1 or 15

5 (a) 11
(b)(i)8 (ii) 15/17 (iii) 8/15 (iv) 1.765
(c)(i) 27 (ii) 38

6 (a) (i) 210 (ii) 84
(b)(i) 2/5 (ii) 3/20 (iii) 1/4 (iv) 3/8
(c)(i) 3456 (ii) 840 (iii) 480 (iv) 360

7 (a) (ii) 32 (iii) 13.3
(b) (ii) 46.4 (iii) 330

11 (a)(i) x+2y-4=0 (ii) x+2y-4<(or equal to)0, x>(or equal to)0 , y>(or equal to)0
(b)(i) 160x+40y<(or equal to)2080 , 3x+2y<(or equal to)54. (ii) (0,27) (iii) (6,8)

Can't remember all the answers I got, but a lot of them look familiar.

Shanotheslayer · 14-06-2010 05:32PM

ihavequestions wrote: »

Did I round down in Q5 is it ? When I said 38 ? Ya its ment to be 39
But wooooo go us ( assuming that the 3 of us have'nt all made the same mistakes and gotten everything wrong )

I meant on Question 6 for the probability:/ I was stuck between 2 ways in how to do 6B probability:/ Hopefully did it right

ihavequestions · 14-06-2010 05:34PM

Shanotheslayer wrote: »

I meant on Question 6 for the probability:/ I was stuck between 2 ways in how to do 6B probability:/ Hopefully did it right

Oh! How did you do it?

Shanotheslayer · 14-06-2010 05:45PM

I'll get back to you on that mate! I'll have a look now and Pm you.

Shanotheslayer · 14-06-2010 05:52PM

For B(ii) I got

10/25 +(or x) 9/25= Im pretty sure I should of done 9/24 though:/

I really can't remember:s

iWeeze · 14-06-2010 05:54PM

Think I should get close to 50 in 1, 2, 6, 7 and 11.
Only thing I didn't do was part B on 3, hadn't a blue's clues.

0.M.GXX · 14-06-2010 05:56PM

i am tOtallly with you there.. i thought it was awful.. even though every 1 thought it was easy... im jus hoping some how ..i manage to get a C3.. uttterly sad...:(

STBR · 14-06-2010 05:58PM

Sorry not meaning to be cocky or anything but WHAT a great paper. Almost certain I got 100% on that!

Did 1, 2, 3, 5, 6, and 11.

7 looked good but I was so sure of the others I spent the time going over them.

Joseph · 14-06-2010 06:00PM

Just on 5 C (ii), you won't loose marks for rounding it down if you were rounding off as you went and thats why you ended up with 38 like for me

Viva La Cozzy · 14-06-2010 06:07PM

went alot better than paper one anyway..are and volume was one of the easiest questions i've seen in years...way easier than the pre...i say i got full marks in it, and i usually mess up part C in that question...I had to do so much cramming to learn most of the stuff off though, i was expecting to wake up at 7 to study this morning but i didn't wake up till 8

i only got a glance in at vectors so i messed up part C...couldn't even attempt it

part A and B were handy though so i mot likely passed that question

Joseph · 14-06-2010 06:11PM

My answers:

1 (a) (i) 72 cm (ii) 324 cm ^2
1 (b) (i) 195 m ^2 (ii) 2.5% error
1 (c) (i) 121.5 m ^3 (ii) 3.4 cm
2 (a) Did 2 attempts at this and got 7 units ^2 and 18 units ^2
2 (b) (i) True (ii) (5,0) (iii) Ok (iv) 4x + 3y + 5 = 0
2 (c) (i) 10 (ii) (-13,19) (iii) True
Skipped 3
Skipped 4
5 (a) 11 cm ^2
5 (b) (i) 8 (ii) 15/17 (iii) 8/17 (iv) 0.83 (or 240/289)
5 (c) (i) 27 m (ii) 38 m
6 (a) (i) 210 (ii) 84
6 (b) (i) 2/5 (ii) 3/20 (iii) 1/4 (iv) [Attempt 1: 1/2] [Attempt 2: 8/5]
6 (c) (i) 3456 (ii) 840 (iii) 480 (iv) 630
7 (a) (i) Ok (ii) 32 (iii) [Attempted but no answer as such]
7 (b) (i) Ok (ii) 48 (iii) 70 People [From memory, forgot to write down]
9 (a) (i) 5i + 12j (ii) 13
9 (b) (i) Ok [Might have put it in the wrong direction] (ii) Ok (iii) Ok ** Did we need to use graph paper?**
9 (c) (i) Got 0=0 (ii) [Ran out of time - didn't attempt]

I've highlighted some ones there, could anyone confirm if I got them right or what I did wrong ? Cheers

Shanotheslayer · 14-06-2010 06:15PM

Deaddude wrote: »

My answers:

2 (a) Did 2 attempts at this and got 7 units ^2 and 18 units ^2

(iv) 630

** Did we need to use graph paper?**
9 (c) (i) Got 0=0

I think I got 18 but no remender? Can't remember though. I'm fairly sure I got 630!

And 9C 100% confident its 0=0 dot product= 0

that R is perpendicular to S or whatever the letters were:)

And for all of 9B I used graph paper.

Professional Griefer · 14-06-2010 06:17PM

SirDarren wrote: »

Sorry not meaning to be cocky or anything but WHAT a great paper. Almost certain I got 100% on that!

Did 1, 2, 3, 5, 6, and 11.

7 looked good but I was so sure of the others I spent the time going over them.

Completely agree. I came out so happy. It was really easy imo, but I guess its like that when you do honours for most of the leaving cert 2 years.:D:D

Orlaladuck · 14-06-2010 06:19PM

Delighted with it - it was almost perfect except for 3B and the probability was a bit 50/50 otherwise it was grand, really happy with it

Sl!mCharles · 14-06-2010 06:22PM

Yeah probability was tough, usually a bit easier i thought!

*giggles* · 14-06-2010 06:28PM

Much better than Paper 1 I thought. Not as tough as other years. Linear programming went well, didn't like Question 2 or 3. Other than that, pretty happy.

Victoria. · 14-06-2010 06:30PM

I was pretty pleased with that paper.
From looking at some of the answers on here they look familiar anyway.
I did 1,2,3,5,6,11
No major problems didn't get the last bit of 11 because I was rushing and did trig at the last minute and I got one part wrong I can remember.
Was happy coming out much better than paper one.

toto14 · 14-06-2010 06:33PM

so happy with both papers!!! should get an a

...i dropped from honours last year tho so dont feel bad if you thought it was hard....a lot in my school werent happyish i think

Captain-America · 14-06-2010 06:37PM

Had these myself. Bolded the ones that seem to differ from other people's.

1 (a)(i)72 (ii) 324 (b)(i) 195 (ii) 2.5% (c)(i)121.5pi (ii) 7.5

2 (a) 17 (b)(i)0=0 (ii) (0,-3.75) (iii) (5,0)(0,3.75) (iv) 3x -4y +15=0(Should get the marks for the latter two though, because the questions were linked) (c)(i) 10 (ii) (-13,19) (iii) True

3 (a)(i) 13 (ii) x^2 + y^2 = 169 (b)(i) (17,-4.25) (ii) (-17,4.35) (This looks wrong. Should get the marks for the second one though) (c)(i) r=10 C=(1,-7) (ii) h=15 or -1

Didn't do 4.

5 (a) 11 (b)(i) 8 (ii) 15/17 (iii) 8/17 (iv) 0.8304 (c) (i) 27 (ii) 21

Didn't do 6.

7 (a)(i) / (ii) 32 (iii) Square root of 0/20, Definitely wrong. (b)(i) / (ii) 46 (iii) 320

11 (a)(i) 2x + 4y - 8=0 (ii) 2x+4y-8<(or equal to)0, x>(or equal to)0 , y>(or equal to)0 (b)(i) 4x + y <(or equal to) 52, 3x + 2y <(or equal to) 54 (ii) (0,27) (iii) (12,0)

Anybody else get similar answers to the ones I have in bold?

ThePower180 · 14-06-2010 06:37PM

Thought it went well now. I got most of the answers that are posted up here. I read question 1(C) wrong. I thought the radius was 9 so the two answers I got were double what they were supposed to be. But hopefully I will get a few attempt marks. Overall it was a paper where marks could be picked up easily.

Seloth · 14-06-2010 06:39PM

From doing this I honestly belive I'm going to fail maths!

I did atrociouse at this,Not great with pr1 either...even told my teacher after

Ordinary level is far to divided tbh,I think there should be another place thats easier then pass but not as near easy as foundation.

PARARORY · 14-06-2010 06:40PM

11 (a)(i) 2x + 4y - 8=0 (ii) 2x+4y-8<(or equal to)0, x>(or equal to)0 , y>(or equal to)0 (b)(i) 4x + y <(or equal to) 52, 3x + 2y <(or equal to) 54 (ii) (0,27) (iii) (12,0)

Anybody else get similar answers to the ones I have in bold?

The last part is fully correct

Captain-America · 14-06-2010 06:45PM

PARARORY wrote: »

The last part is fully correct

Awesome

STBR · 14-06-2010 06:50PM

3(b)(i) was just a simultaneous right?

Lot of people seem to be having trouble with it so just wondering if I thought it was easy because maybe I actually did it wrong!

Point of intersection, so it has to be

JoeyBuddy · 14-06-2010 06:54PM

Thought it was easy compared to paper 1.
A1 hopefully. Will post answers later/tomorrow.

maisiedaisy · 14-06-2010 07:01PM

Philly_C wrote: »

Thought that was a fair enough paper. For anyone who couldn't get Q3(b) I think this is right. you had to let x = 4y + 17 then sub it into x2 + y2 = 17 then just solve it and get your quadratic equation and the factorise to get x and y and thats your point. Then for the second part you could do it by translation.

That's what I did...used minus b and you ended up with one value for x...it seemed right anyways!!

FridaysWell · 14-06-2010 07:06PM

Why did alot of people find Q3 (b) hard?

For part (i) do you not just let x = 4y + 17, sub that into the circles equation and find your point that way?

I did it that way and I got (1, -4)

Anyone else get this?

And did anyone do vectors? I thought the question felt a little too simple... Especially for part (b)... What you think?

STBR · 14-06-2010 07:12PM

maisiedaisy wrote: »

That's what I did...used minus b and you ended up with one value for x...it seemed right anyways!!

Didn't use minus b formula, just factorized it.

Both values for x turned out to be -4 as far as I remember.

STBR · 14-06-2010 07:13PM

FridaysWell wrote: »

Why did alot of people find Q3 (b) hard?

For part (i) do you not just let x = 4y + 17, sub that into the circles equation and find your point that way?

I did it that way and I got (1, -4)

Anyone else get this?

And did anyone do vectors? I thought the question felt a little too simple... Especially for part (b)... What you think?

Exact same. I can't see the difficulty really

OL Maths paper 2

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