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Oak trees

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by deepalimittal26 » Tue Oct 23, 2012 12:56 pm
Answer is A
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by tapdoanhp » Wed Oct 24, 2012 1:25 am
IMO, the question is derived from a math problem:
Let say there are K trees in Oregon and have X1, X2,..Xk leave(s)respectively. From the premise, we have:
1<= X1, X2,..Xk <k and X1, X2,... Xk are all positive integers.
AS we know, from 1 to k-1 only have k-1 positive integers then there are at least two Xi, Xj get the same value. Hence, C is the best choice.
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by mparakala » Wed Oct 24, 2012 11:42 am
C!

tough one! thanks for posting it!
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by Rastis » Wed Nov 28, 2012 5:52 am
Does anyone have a better explanation than what has been posted? Also, what does IMO mean?
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by brijgmat » Thu Jan 03, 2013 10:47 am
As there is no direct implication for options A and B, I prefer to evaluate C first.

C sounds correct for atleast one leave on tree, and D and E are illogical, hence answer is C.
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by dealer88 » Sat Jan 05, 2013 1:13 am
I will go with C and D both...
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by davidschneider » Sat Jan 05, 2013 1:02 pm
Danaj's explanation was great.

Answer: C
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by Practicegmat » Tue Jan 08, 2013 8:02 pm
I wish we will not get such questions on the exam day
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by rajeshsinghgmat » Wed Jan 16, 2013 10:28 pm
C is the answer.

T>L >= 1.

Let, T = 4, then L = {1,2,3}
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by e-GMAT » Sat Jan 19, 2013 3:13 am
This is very mathematical thinking oriented question. I have never come across a similar question among the official CR questions.

However, for the sake of understanding, let's look at it.

Let's suppose there are n tress.
So, any tree can have number of leaves from 1 to n-1. So, n-1 trees can have different values of number of leaves. Now, the reamining tree i.e. the nth tree has to have one of these values (from 1 to n-1) since no values outside this range is possible.

Therefore, at least two trees will have the same number of leaves.

Thus, the correct choice is C.

Hope this helps :)

Thanks,
Chiranjeev
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by ishaparul » Tue Mar 05, 2013 5:15 pm
I only have one thing to say. If I see a question like this on the test, I will be making a guess in less than 5 seconds and moving on to the next question.
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by VyDinh » Mon May 13, 2013 7:52 pm
IMO: A
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by akanksha_soneja » Fri Jun 07, 2013 5:24 am
tough question..haven't come across such a a question before...
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by amitkmorti » Fri Jul 05, 2013 7:25 am
Yes... I got it right.
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by sansulee » Thu Nov 07, 2013 2:37 am
Good explanation. Such type of questions usually just confound me. :/
Success is the ability to go from failure to failure without losing your enthusiasm.
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