Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    12
    ReputationRep:
    (Original post by RichE)
    It is (b).
    (Original post by jadoreétudier)
    Could you look at G again because I still think b is the answer.
    Would you mind explaining why?

    It's entirely possible I'm wrong but this is my reasoning.

    The standard pythagoras is a^2+b^2 = c^2

    In this case, instead of there being a square, there is a triangle instead. We assume then each value takes:

    0.5 (a^2), 0.5(b^2) and 0.5(c^2).

    To me it would seem logical that you could double each value to make the ultimate equation the same.

    ie I would have thought that

    k(a^2+b^2) = k(c^2) (assuuming k does not equal 0)

    Thank you.
    Offline

    2
    ReputationRep:
    (Original post by RichE)
    It is (b).
    Thank you.

    If you call the base of the triangles, a, b and c. Then a^2 + b^2 = c^2
    The area of a triangle is 1/2 bh, the height of an equilateral triangle is the square root of three times the base over 2. The area of the triangle is root 3 over 4 times the base squared. Which leads to the conclusion that A + B = C
    Offline

    15
    ReputationRep:
    (Original post by BankOfPigs)
    Would you mind explaining why?

    It's entirely possible I'm wrong but this is my reasoning.

    The standard pythagoras is a^2+b^2 = c^2

    In this case, instead of there being a square, there is a triangle instead. We assume then each value takes:

    0.5 (a^2), 0.5(b^2) and 0.5(c^2).

    To me it would seem logical that you could double each value to make the ultimate equation the same.

    ie I would have thought that

    k(a^2+b^2) = k(c^2)

    Thank you.
    You are right in what you write and then A= ka^2, etc. so the answer is (b).
    Offline

    0
    ReputationRep:
    (Original post by BankOfPigs)
    Would you mind explaining why?
    A is the area not the side length
    Offline

    2
    ReputationRep:
    (Original post by BankOfPigs)
    Would you mind explaining why?

    It's entirely possible I'm wrong but this is my reasoning.

    The standard pythagoras is a^2+b^2 = c^2

    In this case, instead of there being a square, there is a triangle instead. We assume then each value takes:

    0.5 (a^2), 0.5(b^2) and 0.5(c^2).

    To me it would seem logical that you could double each value to make the ultimate equation the same.

    ie I would have thought that

    k(a^2+b^2) = k(c^2) (assuuming k does not equal 0)

    Thank you.
    In the possible answers A, B and C refer to the area of the triangles. I think you've just calculated the areas wrong. It's 1/2bh for the area, not 1/2 times any two sides. Hopefully That helps
    Offline

    12
    ReputationRep:
    Sorry yes you guys are obviously right.

    I completely mistook the Area for the side length in the diagram.

    That would be why I was getting such answers

    Thank you all.
    Offline

    11
    ReputationRep:
    (Original post by BankOfPigs)
    I can't confirm this but I'm fairly sure you can't just call the variable x^10 a constant when you have a "quadratic " in x.
    Yeah, these were my thoughts too. Most likely luck that it happened to lead to the right answer.


    Was wondering what people's thoughts were on the 2012 paper. Is it just me, or does (parts of) '12 seem uniquely difficult?
    Offline

    0
    ReputationRep:
    (Original post by sun_tzu)
    I had a look at some STEP months ago
    my current strategy is to do all 8 MAT papers before wednesday
    and trinity college

    you applying for cambridge too?
    I have some friends in Trinity, apparently the most of them there receive some scholarships. Months ago I would be answering yes myself, but I decided to go for Oxford because of the joint course with Philosophy

    I did all the papers but still don't feel confident at all... After the STEP practicing, you must be finding the MAT really easy by now
    Offline

    0
    ReputationRep:
    (Original post by jadoreétudier)
    I agree with all your MC answers. K you have the right answer, 0.2. But you would do 3*1/13*12/13*12/13.. because you don't know which card will be the King.

    For 3.b), the slope (gradient) of the line in the question is a, so the slope of the perpendicular line will be -1/a. Not sure where you got m=1 from. for c), the algebra is quite messy. You're trying to find the two tangents to the circle x^2 + y^2 =1 (in order for the perpendicular distance from the origin to equal one) which go through the point (1,2). for d) try looking at the difference in areas you have worked out
    Ohhh you're absolutely right! I don't know why I took the slope as -1 from part 1... Do you then get ay+x=1+2a ?

    Apparently I made 1k) far more complicated as we don't need to use conditional probability.

    Thanks for the explanation for part c), I do get it now
    Offline

    1
    ReputationRep:
    (Original post by Yezi_L)
    I have some friends in Trinity, apparently the most of them there receive some scholarships. Months ago I would be answering yes myself, but I decided to go for Oxford because of the joint course with Philosophy

    I did all the papers but still don't feel confident at all... After the STEP practicing, you must be finding the MAT really easy by now
    Okay, I want to take a look at STEP papers, but I hardly know much about it. What's the order of difficulty? III>II>I?
    Offline

    0
    ReputationRep:
    (Original post by MathGirl)
    Hello there! Actually I'm studying something other than the British A-levels too! Yep! Let's practise more! Guess I need a bit of luck too
    So I guess that you're an international applicant? Or are you doing the IB in the UK

    I'll wish you good luck in advance then But as far as I've seen you're doing really well(scoring 80+)
    Offline

    0
    ReputationRep:
    (Original post by souktik)
    Okay, I want to take a look at STEP papers, but I hardly know much about it. What's the order of difficulty? III>II>I?
    That's right. But apparently it's also because STEP III includes a bit more stuff.
    Offline

    0
    ReputationRep:
    (Original post by TheFuture001)
    Yeah, these were my thoughts too. Most likely luck that it happened to lead to the right answer.


    Was wondering what people's thoughts were on the 2012 paper. Is it just me, or does (parts of) '12 seem uniquely difficult?
    I did terribly bad that paper...



    Sorry for the amount of posts in a row
    Offline

    1
    ReputationRep:
    (Original post by Yezi_L)
    That's right. But apparently it's also because STEP III includes a bit more stuff.
    Looking at STEP III 2013. The problems are nice!
    Offline

    1
    ReputationRep:
    Can anyone link me to some hard MAT level/style coordinate geometry questions? They're usually what I do worst on and they come up a lot so any practice would be helpful
    Offline

    1
    ReputationRep:
    (Original post by Mike_Ross)
    Can anyone link me to some hard MAT level/style coordinate geometry questions? They're usually what I do worst on and they come up a lot so any practice would be helpful
    try www.drfrostmaths.com, see Oxbridge section

    good luck on wednesday
    Offline

    0
    ReputationRep:
    (Original post by souktik)
    Looking at STEP III 2013. The problems are nice!
    I'll have a look right now Which part are you doing? Those on pure maths?
    Offline

    1
    ReputationRep:
    (Original post by tanno1992)
    try www.drfrostmaths.com, see Oxbridge section

    good luck on wednesday
    Exactly what I was after! Thank you
    Offline

    1
    ReputationRep:
    (Original post by Yezi_L)
    I'll have a look right now Which part are you doing? Those on pure maths?
    Oh, I don't really have the time to do a paper properly. I was just skimming through the questions. I might try the statistics section a few hours later. That's a section I feel more or less confident about.

    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by Yezi_L)
    So I guess that you're an international applicant? Or are you doing the IB in the UK

    I'll wish you good luck in advance then But as far as I've seen you're doing really well(scoring 80+)
    Yep I'm international, but I'll be sitting for the A-levels too, just haven't got round to studying for them :\ So in theory I'm not doing the A-levels because my school doesn't do them! haha

    2011 is the only paper I got an 80 in! I found 2007 and 2008 easy but the other papers are soooo difficult. Good luck too!
 
 
 
Poll
Who is your favourite TV detective?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.