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# 2) If n is a +ve integer, what is the units digit of n A)

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Manager
Joined: 13 Jul 2007
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2) If n is a +ve integer, what is the units digit of n A) [#permalink]  17 Oct 2007, 07:18
2) If n is a +ve integer, what is the units digit of n
A) The units digit of 11^n is 4
B) Hundreds digit of 5^n is 6.

Pls explain how units digit of 11^n can be 4 in A.

I got E. Any other answers?
Manager
Joined: 19 Aug 2007
Posts: 170
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i dont get it, the units digit of 11^n can never be 4 when n is a positive integer.
Manager
Joined: 25 Aug 2007
Posts: 70
Schools: HBS '10
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Kudos [?]: 2 [0], given: 0

It's E ...

5^5 = 625
5^7 = 15,625 , and this doesn't work...
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