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Master | Next Rank: 500 Posts
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by tanyajoseph » Mon Sep 10, 2007 12:49 pm
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
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Source: — Data Sufficiency |
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by samirpandeyit62 » Mon Sep 10, 2007 11:09 pm
Hi Tanya,
I think u have missed something in the Q 3^(4n+2) does'nt have m any where.
Regards
Samir
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by tanyajoseph » Mon Sep 17, 2007 3:43 am
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:-|
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by samirpandeyit62 » Mon Sep 17, 2007 4:24 am
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.
Regards
Samir
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by tanyajoseph » Mon Sep 17, 2007 5:40 am
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 :)
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