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Director
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Any takers for this [#permalink] New post 11 Sep 2007, 20:04
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
Any takers for this?
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Re: PS - Again from Gmat prep [#permalink] New post 11 Sep 2007, 20:10
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
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Re: PS - Again from Gmat prep [#permalink] New post 11 Sep 2007, 20:19
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, 20:19
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