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Source: — Data Sufficiency |
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by liferocks » Wed May 19, 2010 9:23 am
3^(4n+2)=9*(81^n)
when this is divided by 10 reminder will be (-1)(1^n)=-1

so when we divide 3^(4n+2)+m by 10 reminder is m-1

From 1...
N=2..no information about m hence not sufficient

From2
m=1..so reminder is 1-1=0...sufficient

Ans option B
"If you don't know where you are going, any road will get you there."
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by sp.wonder2010 » Wed May 19, 2010 9:29 am
liferocks wrote:3^(4n+2)=9*(81^n)
when this is divided by 10 reminder will be (-1)(1^n)=-1

so when we divide 3^(4n+2)+m by 10 reminder is m-1

From 1...
N=2..no information about m hence not sufficient

From2
m=1..so reminder is 1-1=0...sufficient

Ans option B
Thanks a lot!
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