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    (Original post by davidt)
    1) Expression for how many he gets wrong:

    If he as 30 questions and gets X right, he gets 30-X wrong.

    2) Expression for how many points he gets.

    He starts with 25 points:

    points = 25

    He gets 4 for every question right:

    points = 25 + 4x

    He gets -1 for every question wrong:

    points = 25 + 4x + -1(30-x)

    expand and cancels to

    points = 5x - 5 (i think if I remember correctly)

    3) He gets 80 points, how many did he get right

    point = 5x - 5
    80 = 5x - 5

    80 + 5 = 5x

    5x = 85

    x = 17.
    Ooh, just a little faster than me :mad: :p: (add lots of smilies)
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    Don't worry about it, the world can hold two genii
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    (Original post by davidt)
    Don't worry about it, the world can hold two genii
    We better hope so.
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    (Original post by staylor)
    1 000 000 = million
    1 000 000 000 = billion
    1 000 000 000 000 = trillion

    1 billion million = 1 000 000 000 000 000

    No, there are a million million in a trillion. 1 billion million is one million billion.
    Isn't that the American version? I always thought a million million is a billion
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    (Original post by lovingbuzz)
    for the last question with the 3 people passing, I put 0.9.
    Did anyone do question 13 about finding what p+q was and finding the coordinate A?
    Yeah I couldnt do it at first but then I went back to it at the end and worked it out.
    Basically (I cant remember exact figures) but the formula or whatever was a quadratic and by using the quadratic formula you got given two possible solutions. One solution had already been used (the 2 in 2,0) so you knew it would be the other one which If i remember rightly was -6??? anyway, that gave you the first number (6,...) and the second number was 0 because it was on the x axis. or was it the y axis, well basically it was on the line :P
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    (Original post by UpliftMof0)
    Yeah I couldnt do it at first but then I went back to it at the end and worked it out.
    Basically (I cant remember exact figures) but the formula or whatever was a quadratic and by using the quadratic formula you got given two possible solutions. One solution had already been used (the 2 in 2,0) so you knew it would be the other one which If i remember rightly was -6??? anyway, that gave you the first number (6,...) and the second number was 0 because it was on the x axis. or was it the y axis, well basically it was on the line :P
    well, I got that right!! I guessed that it was -6. wow. luck thing is with me! yay
    on the otherhand, other questions were wrong.
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    Isn't that the American version? I always thought a million million is a billion
    They gave you the american numberso nthe page. I always think of it going up in steps of 3 (10^6, 10^9 etc).

    Yeah I couldnt do it at first but then I went back to it at the end and worked it out.
    Basically (I cant remember exact figures) but the formula or whatever was a quadratic and by using the quadratic formula you got given two possible solutions. One solution had already been used (the 2 in 2,0) so you knew it would be the other one which If i remember rightly was -6??? anyway, that gave you the first number (6,...) and the second number was 0 because it was on the x axis. or was it the y axis, well basically it was on the line :P
    My friend and I both got -4,0 for point A. I did it first as simultaneous, then solved that quadratic by completing the square. Intersected at something like 1.5, 1 for me.

    Subsequently got figure 2 on the next page.
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    (Original post by davidt)
    They gave you the american numberso nthe page.
    that's so unfair!! :eek:
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    (Original post by davidt)
    They gave you the american numberso nthe page. I always think of it going up in steps of 3 (10^6, 10^9 etc).



    My friend and I both got -4,0 for point A. I did it first as simultaneous, then solved that quadratic by completing the square. Intersected at something like 1.5, 1 for me.

    Subsequently got figure 2 on the next page.
    Im sure it might have been that -6 was just a guess from what i can remember (its so long ago now :P)
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    i did higher and that was so freakin hard! well my maths teach. sed that if evry1 found it hard, they'll pull the grade boundaries down! Gosh - that was so intimidating and my brain actually hurt in that exam
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    well my maths teach. sed that if evry1 found it hard, they'll pull the grade boundaries down! Gosh - that was so intimidating and my brain actually hurt in that exam
    All depends - if the top 10% or so found it okay then the a* boundary would remain the same. However if everybody else found it rock solid they probably would go down. However, if boundaries go down it wouldn't really affect individual candidates.

    E.G. If you're in the bottom 50% of people then even if boundaries change you'll still be in the bottom 50%.

    It will be very interesting to see what hte boundaries are though.
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    Wow, kudos to you all because I couldn't even look at all your replies discussing the differnet answers you got. I really don't want to look at any of it because if I see something different to what I put, I'm afraid it will worry me and occupy my mind for the next two months or so. I did intense maths revision two weeks prior to the exam, and I was so confident before going in. How ignorant of me.
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    (Original post by hearthethunder)
    Isn't that the American version? I always thought a million million is a billion
    I cant remember - its all mixed up in my head.
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    (Original post by Funkymonk)
    Wow, kudos to you all because I couldn't even look at all your replies discussing the differnet answers you got. I really don't want to look at any of it because if I see something different to what I put, I'm afraid it will worry me and occupy my mind for the next two months or so. I did intense maths revision two weeks prior to the exam, and I was so confident before going in. How ignorant of me.
    Well it all gets thrown back in your face and its not fair. It's not fair on canditates that work hard. I think that exam was pretty dire.
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    (Original post by soulsussed)
    Well it all gets thrown back in your face and its not fair. It's not fair on canditates that work hard. I think that exam was pretty dire.
    It was. I revised loads and a lot of it wasnt on and couldnt do some stuff, like Q13. Hoepfully the calculator will be alot easier, I always find calculator easier anyway.
 
 
 

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