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Source: — Data Sufficiency |
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by outreach » Mon Aug 09, 2010 8:12 am
is the answer A?

Q is "n*integer=m"

(1) 3n^2+7n=m
n(3n+7)=m

(3n+7) is the integer

suff



(2) m^2-m is a multiple of n
n*integer=m*(m-1)
insuff
alivapriyada wrote:If m and n are integers greater than 1,is m a multiple of n?
(1) 3n^2+7n=m
(2) m^2-m is a multiple of n
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by selango » Mon Aug 09, 2010 8:33 am
m>1 and n>1

m=n*a?

stmt1,

m=3n^2+7n=n(3n+7)

-->m=n*a[a=3n+7]

Suff

stmt2,

m^2-m=n*a

m(m-1)=n*a

Let m=6,n=3,a=10

-->6*5=3*10,m is multiple of n


Let m=4,n=3,a=4

-->4*3=3*4,m is not multiple of n

Insuff

Pick A
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by alivapriyada » Mon Aug 09, 2010 10:48 am
hey folks!!
Yes the answer is A ,but i got C.
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