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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]

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17 Oct 2007, 08:18
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

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
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17 Oct 2007, 09:28
i dont get it, the units digit of 11^n can never be 4 when n is a positive integer.
Manager
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17 Oct 2007, 19:11
It's E ...

5^5 = 625
5^7 = 15,625 , and this doesn't work...
17 Oct 2007, 19:11
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