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Director
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Joined: 08 Jun 2007
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Any takers for this [#permalink] New post 11 Sep 2007, 19:04
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Any takers for this?
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VP
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Joined: 10 Jun 2007
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Re: PS - Again from Gmat prep [#permalink] New post 11 Sep 2007, 19:10
ashkrs wrote:
Any takers for this?


3^(4n+2) always give the unit digit of 1
Therefore, if you always have a unit digit of 1, knowing that m is less than 10 will be sufficient.

Ans = B
Director
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Re: PS - Again from Gmat prep [#permalink] New post 11 Sep 2007, 19:19
bkk145 wrote:
ashkrs wrote:
Any takers for this?


3^(4n+2) always give the unit digit of 1
Therefore, if you always have a unit digit of 1, knowing that m is less than 10 will be sufficient.

Ans = B


I think, 3^(4n+2) will always give unit digit as 9. (For all +ve values of n)
So if m = 1 , remainder will always be 0.

Hence B is sufficient.

- Brajesh
Re: PS - Again from Gmat prep   [#permalink] 11 Sep 2007, 19:19
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