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50 tricky questions

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Re: 50 tricky questions [#permalink] New post 23 Jun 2010, 00:42
5
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KUDOS
Not just verbal kudos. :)

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Re: 50 tricky questions [#permalink] New post 23 Jun 2010, 19:23
Great, Thanks for sharing
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Re: 50 tricky questions [#permalink] New post 15 Jul 2010, 18:04
Thanks for posting these questions... +1 from me....

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Re: 50 tricky questions [#permalink] New post 28 Jul 2010, 02:45
although I missed most of the questions still it's very helpful source!!

thanks

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Re: 50 tricky questions [#permalink] New post 31 Jul 2010, 02:44
hey guys - the answer for the first MATH problem is 159 and so the solution is wrong in pdf...

here is why:

from the solution in arithmetic progression you got n=79

so the d=2, first term = 2 and so the last term would be a+(n-1)d = 2+(79-1)2 = 159

cherio...
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Re: 50 tricky questions [#permalink] New post 31 Jul 2010, 03:15
I am doing these questions but they do not look like GMAT questions.
Is it beneficial to to solve these questions?
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Re: 50 tricky questions [#permalink] New post 06 Aug 2010, 05:46
Thanks for sharing.
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Re: 50 tricky questions [#permalink] New post 06 Aug 2010, 11:07
Thank you. I just downloaded attachments to solve at home.
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Re: 50 tricky questions [#permalink] New post 18 Aug 2010, 22:28
thanks for good links
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Re: 50 tricky questions [#permalink] New post 19 Aug 2010, 03:33
madeinafrica wrote:
Thanks for the questions..Kudos.

By the way, I don't agree with the answer to question 1.

You said n=79, but if n=79 then we would have:
2+4+6+8+....+78 = 2(1+2+3+4+....+39) = 2 (39*40/2) = 39*40.

Ithink the answer should be 159.

2+4+6+...+158 = 2(1+2+3+..+79) = 2(79*80/2) = 79*80.


were are the answers from?


---
Well spotted.
The 'n' in the Arithmetic Progression equation should be replaced with (n-1)/2. Because when you have every other number in a continous series, the total no of even numbers is (n-1)/2 when the nth term is odd.
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Re: 50 tricky questions [#permalink] New post 20 Aug 2010, 21:32
That's great thanks!

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Re: 50 tricky questions [#permalink] New post 24 Aug 2010, 19:08
thanks..kudos to you
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Re: 50 tricky questions [#permalink] New post 27 Aug 2010, 01:49
Thanks for sharing!
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Re: 50 tricky questions [#permalink] New post 27 Aug 2010, 03:23
thanks....it'll be helpful for sure. :)
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Re: 50 tricky questions [#permalink] New post 03 Sep 2010, 01:02
mohanksri wrote:
hey guys - the answer for the first MATH problem is 159 and so the solution is wrong in pdf...

here is why:

from the solution in arithmetic progression you got n=79

so the d=2, first term = 2 and so the last term would be a+(n-1)d = 2+(79-1)2 = 159

cherio...


Was wondering the same..
Good spot !
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Re: 50 tricky questions [#permalink] New post 13 Sep 2010, 11:50
Is this where we can discuss the solutions to the problems? I'm looking at problem two and don't quite understand a couple of things.

1) Do we have to add the two equations: x+y+z=50 & 6x-2y-z=192 or can we subtract them? Why or why not?
2) Where does the assumption that y can't be 1 or 2 come from. Please explain.

Thanks in advance

Liz

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Re: 50 tricky questions [#permalink] New post 19 Oct 2010, 08:59
Thanks for sharing
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Re: 50 tricky questions [#permalink] New post 20 Oct 2010, 03:11
Great questions. Thanks for sharing!
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Re: 50 tricky questions [#permalink] New post 29 Jul 2011, 22:21
Thanks for sharing!!!
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Re: 50 tricky questions [#permalink] New post 02 Aug 2011, 13:03
How are you supposed to actually learn how to solve these questions? I could spend an hour trying to solve some of the questions and even that I will probably still be stumped....is there a good way to learn the tricks to solve these toughies?
Re: 50 tricky questions   [#permalink] 02 Aug 2011, 13:03
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