# Int 2 maths

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1. (Original post by cheesejug)
For the paper 1 factorising question did anyone else get a(a+b)+b(a+b)? And for the one about whether mean or median was more representative, which one did you say? I put mean but apparently that's wrong because the randomly huge number skewed it...

And for the emissions one, I think it was just one of those 'the price of the house falls by 3.5% each year' questions in disguise. The reason you can't do 15*4 to get 60% is because each time, after the 15% has been taken off, the emissions are lower, and therefore the 15% of it is lower... if that makes any sense. So 100-15% = 85, then 85-15%=72.25, not 100-(15+15)%=70.

I'm not happy now. I thought that was one of the ones I got right?!?! L-( 4 marks gone!
2. (Original post by pikey358)
Counted up my potential marks and end up getting 66%..-gutted. Wouldnt recommend counting up youre marks..
66% is a pass? why you upset?
3. Somehow, for question 12 on the calculator (about the yacht and canoe from the clifftop) I got h = 44.6 after doing 4 pages of working.

Also, what did everyone get for 5cosx-3=1? I think I got 36?
4. (Original post by scottishstudent)
Somehow, for question 12 on the calculator (about the yacht and canoe from the clifftop) I got h = 44.6 after doing 4 pages of working.

Also, what did everyone get for 5cosx-3=1? I think I got 36?
The first part was 36, but you then had to take 36 away from 360 to get your 2nd answer
5. (Original post by CSM1996)
The first part was 36, but you then had to take 36 away from 360 to get your 2nd answer
Do you think I'd get a mark for just the first part?
6. You'll only lose 1 mark out 3! which is still really good because you will get a mark for getting cosx = 4/5 then 1 mark for 36
7. Scared to even think about the non calculator in all honesty
8. I brought the papers out of the exam with me so im going to work at them. God, I looked at paper 1 and actually had a year rolling down my face at one point because of the frustration. Paper 2 was much easier. Cannot believe it! 3 exams to go, higher human bio, higher history and int 2 Spanish. Cannot wait until they're over!!
9. (Original post by scottg1511)
66% is a pass? why you upset?
Really really wanted an A... I should be able to appeal easily enough though
10. (Original post by Tribute Lauren)
I brought the papers out of the exam with me so im going to work at them. God, I looked at paper 1 and actually had a year rolling down my face at one point because of the frustration. Paper 2 was much easier. Cannot believe it! 3 exams to go, higher human bio, higher history and int 2 Spanish. Cannot wait until they're over!!
Any chance you could scan in the papers and post them on here, Lauren?
11. (Original post by pikey358)
Really really wanted an A... I should be able to appeal easily enough though
Going by the paper, the boundary for an A may be lowered and 66 might just scrape an A
12. (Original post by Gazcobain)
Any chance you could scan in the papers and post them on here, Lauren?
I dont have a scanner but I could take pictures a and send the photos to you? :-)?
13. (Original post by Tribute Lauren)
I dont have a scanner but I could take pictures a and send the photos to you? :-)?
That'd be great! Could you send them as a PM? Thanks!
14. If anyone wants to questions they are...

Paper 1:

1)The circumference of the circle is 40.8 cm
Calculate the length of the minor arc AB.
(Degree in circle 110)
2marks

2) Multiply out the brackets and collect like terms
(3x-5)(x(squared)+ 2x-6)
3marks

3. Each capsule is in the shape of a cylinder with hemispherical ends as shown in the diagram. The total length of the capsule is 23ml and the length of the cylinder is 15ml.
Calculate the volume of one cod liver oil capsule.

Full length = 23mm
Just cylinder = 15mm
4 marks

4. Solve
3x(squared) + 7x - 5 =0,
giving the roots correct to one decimal place.
4 marks

5. A ten-pin bowling team recordered the following six scores in a match.
134 102 127 98 104 131

a) calculate
mean:
the standard deviation:

b) choose correct statements (cant be bothered writing out)
-the correct statments were 1 and 4.

6. The simultaneous equation on...

6x + 2y = 3148
5x + 3y=3022

Has the group been overcharged with
2x + 4y = 2056

4marks

7. Express as a single fraction

a/b + b/a

2marks

8. Solve the equation

5cos x -3 = 1

3marks

9. Change subject to formula to D

E= I/D(squared)

3marks

10. The tank has a circular cross-section
The radius of the circle is 1.9m.
The width of the surface of the oil, represented by AB is 2.2m

Calculate the depth..

4marks

11. Simplify with positive indices

(x(squard)y(4) / (x(-3)y(6))

2marks

12. Yacht one..

13. Due to the threat of global warming, scientists recommend in 2010 that the emissions of greenhouse gases should be reduced by 50% by the yer 2050.

The government decided to reduce the emissions of greenhouse gases by 15% every ten years, starting in the year 2010.

Will the scientists recommendations have been achieved by 2050?

4marks

`4. Simplify cosx tanx / sin x

2marks,

(i have to much time on my hands)
15. Those would be Paper 2 questions, surely?
16. (Original post by Aidan88)
Going by the paper, the boundary for an A may be lowered and 66 might just scrape an A
Added up marks again and got 70%?!
Fingers crossed!
17. (Original post by Gazcobain)
Those would be Paper 2 questions, surely?
haha oops yeah!
18. I was quite happy with the paper. The emmissions question was quite sneaky, but I just used the P(1-r/100)^n formula, subbed in 100 as a sum and used 4 for the number of times it decreases. I got that it didn't meet the target, and only decreased by about 48%. The last question i got 1, but i had no idea how to work it out so I just subbed in 1 as x, then put it in the calculator. Hopefully i'll still get the marks although there's no working.
19. for the emissions one i did
100-15 =85
100 x (0.85)^4 = 52.2%
100-52.2 =47.8 %
20. Thought it was pretty hard in all honesty.

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