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remgeo
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If M and N are both positive, what is the value of M sqrt N? 28 Nov 2005, 05:44
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If M and N are both positive, what is the value of M sqrt N?

1) M*N / (sqrt N) = 10
2) (M^2)*N/2 = 50



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If M and N are both positive, what is the value of M sqrt N? 28 Nov 2005, 05:56
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As far I can see, it's D.
M*sqrtN*sqrtN/sqrt N = 10
M*sqrt N=10
So, it's either A or D.

(M^2)N/2=50
(M^2)N=100
Taking sqrt on both sides, M*sqrt N= 10

So, D
But, it could be A, if you take both negative and positive values of the sqrt of 100, in statement 2.
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If M and N are both positive, what is the value of M sqrt N? 28 Nov 2005, 06:03
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anandsebastin
As far I can see, it's D.
M*sqrtN*sqrtN/sqrt N = 10
M*sqrt N=10
So, it's either A or D.

(M^2)N/2=50
(M^2)N=100
Taking sqrt on both sides, M*sqrt N= 10

So, D
But, it could be A, if you take both negative and positive values of the sqrt of 100, in statement 2.
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Well, that was my question basically. sqrt(100) can be + 10 or -10 isnt it. So it has to be A. But Kaplan gives it as D.
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If M and N are both positive, what is the value of M sqrt N? 28 Nov 2005, 06:05
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remgeo
anandsebastin
As far I can see, it's D.
M*sqrtN*sqrtN/sqrt N = 10
M*sqrt N=10
So, it's either A or D.

(M^2)N/2=50
(M^2)N=100
Taking sqrt on both sides, M*sqrt N= 10

So, D
But, it could be A, if you take both negative and positive values of the sqrt of 100, in statement 2.

Well, that was my question basically. sqrt(100) can be + 10 or -10 isnt it. So it has to be A. But Kaplan gives it as D.
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Kill me, it says M and N are positive :wall
I think I should start wearing powerful glasses to not miss anything..
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If M and N are both positive, what is the value of M sqrt N? 29 Nov 2005, 01:37
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(1) M*N / (sqrt N) = 10 --> can get M sqrt(N) by reducing LHS terms. Sufficient.

(2) M^2 * N = 100
MSqrt(N) = +/- 10

Ans: A
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If M and N are both positive, what is the value of M sqrt N? 29 Nov 2005, 02:23
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remgeo
If M and N are both positive, what is the value of M sqrt N?

1) M*N / (sqrt N) = 10
2) (M^2)*N/2 = 50
Show more


From 1 we get M*N= 10 SQRT(N)
=> M*SQRT(N)=10 Statment1 is suff.

From stmt 2 we get (M^2)(N)=100 Taking square root. we get
M(sqrt(N))=10 or M(Sqrt(N))=-10. Since, the question mentions that M and N are both possitive, M(Sqrt(N))=-10 is not possible. Hence the answer is D.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
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Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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