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For how many pair(s) of positive integers m and n, such that n > m > 1

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Joined: 07 Jun 2017
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Concentration: Technology, General Management
GMAT 1: 660 Q46 V38
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For how many pair(s) of positive integers m and n, such that n > m > 1  [#permalink]

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24 Oct 2017, 01:17
2
00:00

Difficulty:

85% (hard)

Question Stats:

46% (00:53) correct 54% (01:30) wrong based on 61 sessions

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For how many pair(s) of positive integers $$m$$ and $$n$$, such that $$n > m > 1$$, is $$m^n$$ not greater than $$n^m$$?

A. 0
B. 1
C. 2
D. 3
E. 4

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Re: For how many pair(s) of positive integers m and n, such that n > m > 1  [#permalink]

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24 Oct 2017, 06:59
1
2
nkmungila wrote:
For how many pair(s) of positive integers $$m$$ and $$n$$, such that $$n > m > 1$$, is $$m^n$$ not greater than $$n^m$$?

A. 0
B. 1
C. 2
D. 3
E. 4

The question asks for how many pairs is $$m^n≤n^m$$

if $$m=2$$ & $$n=3$$, then $$m^n=2^3=8$$ and $$n^m=3^2=9$$, so this satisfies our condition

again if $$m=2$$ & $$n=4$$, then $$m^n=2^4=16$$ and $$n^m=4^2=16$$ this also satisfies our condition.

Hence there are two such pairs

Option C
Re: For how many pair(s) of positive integers m and n, such that n > m > 1 &nbs [#permalink] 24 Oct 2017, 06:59
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