Remainder

[tanyajoseph]

If n and m are positive inteers, what is the remainder when 3^(4n+2) is divided by 10
1) n = 2
2) m=1

By knowin the value of n we can answer the question is what I presumed.
But GMAT Prep gives the answer as (B) Stmt 2 is enough!
How and what is m doin here ??
I can see I am missin some info, if anyone could point that out it would be lot helpful. Thanks

[samirpandeyit62]

Hi Tanya,
I think u have missed something in the Q 3^(4n+2) does'nt have m any where.

[tanyajoseph]

That was pretty much all about the question and I double verified the question!
Had I come across this question anyplace than GMAT prep I would have questioned the credibility of the source. But no such options either as this was from GMAT PREP and this was ALL the information that the question had:-|

[samirpandeyit62]

Well in that case the ans should be A,coz m can be anything, since its not included in the expression 3^(4n+2) so it cannot define/alter the value of this expression.

[tanyajoseph]

I had the exact same reasoning ...but prep software rated me wrong for the question and gave the answer as B alone!!!
No further explanations as the question was from the GMAT PRep questionarre and so I bought it down to the forum