Quantitave appitude

Hi dudes
Here is some good quant problems. Please solve
Q1. Seven persons are sitting in a row in the order A B C D E F and G. Three articles to be distributed among them. How many ways can it be done when no three neighbourers receive an article?
i) 320 ways ii) 180 ways iii) 210 ways and iv) None of these

Q2. The product of three sides of a triangle ABC is 64. Perimeter is best represented by -
i) P >= 12 ii) P=12 iii) P=14 iv) P>=13
 
P=12

I am not sure if such 'too easy' questions are asked in CAT[/QUOTE]


buddy question is a very good one.

The answer is
i) P>=12

why??
because for any three number say a, b and c

AM > GM
so, (a+b+c)/3 > (abc)^1/3

P/3 > (64)^1/3
P > 3*4
P > 12

now if the numbers are same then P=12
so the answer is
P >=12

Now does it seem intelligent ??
Hope so!

Thanks
Premnath
 
Hi guys
can any one solve it.

Q1. If f(x) = mod of [ (1+x) / (1-x)]

what is the range of x and y for which f(x) + f(y) = (2*(x-y)) / ((1-x)*(1-y))

options:
1) -1<x<1 ; -1<y<1

2) x<-1 ; -1<y<1

3) -1<= x <1 ; y<-1 or y>1

4) x<-1 ; y<-1

Please solve it.
Thanks
Premnath
 
premnath said:
Hi guys
can any one solve it.

Q1. If f(x) = mod of [ (1+x) / (1-x)]

what is the range of x and y for which f(x) + f(y) = (2*(x-y)) / ((1-x)*(1-y))

options:
1) -1<x<1 ; -1<y<1

2) x<-1 ; -1<y<1

3) -1<= x <1 ; y<-1 or y>1

4) x<-1 ; y<-1

Please solve it.
Thanks
Premnath
Click to expand...

My take on the above q is option 3)-1<= x <1 ; y<-1 or y>1...Is it correct?

-Deepak.
 
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