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Interesting GMATFix Problem-30

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by arora007 » Tue Sep 21, 2010 1:15 pm
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by goyalsau » Tue Sep 21, 2010 1:52 pm
Awesome problem Man,
It remind me my college when i was preparing for CAT though very unsuccessfully they always had a very good diagram same the diagram this problem has shown, and then asked some thing similar like this one .

I would say that i try to solve it but didn't find the proper solution i am sure somebody will definitely solve it, as there are so many smart people around. but i think answer Should be A

I have some reasoning behind it,
we have the area of the quarter Circle and we have to find the area of shaded reason.
now in only two options they are subtracting the area of quarter circle from the whole area that is option A and D.

After subtracting the area of the quarter circle from the total area, The area that we will left with that is more than required area now , we know that quarter circle area is 25pie/4

things are really very fishy now if you confirm that correct Answer is A then i can go ahead and explain my reasoning otherwise there is no sense.
so
What the official answer? :idea:
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by arora007 » Tue Sep 21, 2010 3:21 pm
A is incorrect.
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by diebeatsthegmat » Tue Sep 21, 2010 10:46 pm
arora007 wrote:Image
gosh! i might be a "genius" when i solved this in 30 mins hahahahha
anyways, is D the answer?
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by arora007 » Wed Sep 22, 2010 2:41 am
hehe....diebeatsthegmat yeah..can u pen down those 30 minutes...
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by diebeatsthegmat » Wed Sep 22, 2010 2:09 pm
arora007 wrote:hehe....diebeatsthegmat yeah..can u pen down those 30 minutes...
yeah, sure... this is what i drafted....
P/S: you must give me a big hug because its 5 am and i should be in bed instead of posting this pic of solution....
hehehehhee
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by arora007 » Wed Sep 22, 2010 2:14 pm
amazing!! kudos!!
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by fatalityish » Wed Sep 22, 2010 4:42 pm
diebeatsthegmat wrote:
arora007 wrote:hehe....diebeatsthegmat yeah..can u pen down those 30 minutes...
yeah, sure... this is what i drafted....
P/S: you must give me a big hug because its 5 am and i should be in bed instead of posting this pic of solution....
hehehehhee
Image
good solution but u have used too many steps to solve the problem. this problem could be done in 1.5 - 2 mins max. depending upon your speed.
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by diebeatsthegmat » Wed Sep 22, 2010 7:24 pm
fatalityish wrote:
diebeatsthegmat wrote:
arora007 wrote:hehe....diebeatsthegmat yeah..can u pen down those 30 minutes...
yeah, sure... this is what i drafted....
P/S: you must give me a big hug because its 5 am and i should be in bed instead of posting this pic of solution....
hehehehhee
Image
good solution but u have used too many steps to solve the problem. this problem could be done in 1.5 - 2 mins max. depending upon your speed.
Image

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Ishaan
yeah, knew it but well, i just did just 1 step more than you did . i made clearly and precise step to explain...
and yeah... it took me 30 mins to think of the solution... i am old...thus forgot almost about maths. hate maths lol
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by goyalsau » Wed Sep 22, 2010 9:48 pm
goyalsau wrote:
I have some reasoning behind it,
we have the area of the quarter Circle and we have to find the area of shaded reason.
now in only two options they are subtracting the area of quarter circle from the whole area that is option A and D.

Great work man but i think it would be wise in these type of problems to eliminate the wrong answers and then give a guess, In this case we left with two possible answers, I guessed it wrong but may be i can get it right some other time.
because test center will not remain open till 5:00 am.

hahaha,
but really great work...
thanks
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by diebeatsthegmat » Thu Sep 23, 2010 10:28 pm
goyalsau wrote:
goyalsau wrote:
I have some reasoning behind it,
we have the area of the quarter Circle and we have to find the area of shaded reason.
now in only two options they are subtracting the area of quarter circle from the whole area that is option A and D.

Great work man but i think it would be wise in these type of problems to eliminate the wrong answers and then give a guess, In this case we left with two possible answers, I guessed it wrong but may be i can get it right some other time.
because test center will not remain open till 5:00 am.

hahaha,
but really great work...
thanks
lol....
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