official quant thread for cat08

[nbangalorekar]

Originally Posted by implex

ur answer is correct but tthe soln is wrong ...

the thing is .. 2 alternate terms will have common factors but not to consecutive terms

so gcd is only 19

i too was thinking on the same lines but when i started out just to confirm, it did not confirm to the above logic.... however i must have gone wrong sumwhere... thanks neways

[Aarav]

Use the concept a*b = gcd(a, b)*lcm(a, b)

x1 = 19.1, x2 = 19.5, x3 = 19.(5.1+1), x4 = 19.(5.6+5), x5 = 19.(35.6+6), ...

When p and q are co-prime gcd(p, pq+q) = gcd(p, p+1) = 1.
=> The common terms other than 19 are co-prime

[IIM maniac]

Originally Posted by Aarav

Never mark an answer other than (1). Mathematics is all about numbers and devoid of assumptions.

@Aarav ,
can you please explain "Never mark an answer other than (1). "..we do
not have a CP so i think answer no 3 is correct (Please correct me if my
approach is wrong anywhere)

[Hi2All]

Hello friends...
If two-third of three-fourth of a number added to three-fourth to the four-fifth of the number is x times of the number, the value of x is

Please explain me with steps..
Thanxx..

[mayankg]

I think the above problem reduces to (2/3*3/4)N +(3/4*4/5)N = x*N
This comes as N/2 + 3N/5= x*N and x =11/10
Did u get confused in words??

[Hi2All]

Originally Posted by mayankg

I think the above problem reduces to (2/3*3/4)N +(3/4*4/5)N = x*N
This comes as N/2 + 3N/5= x*N and x =11/10
Did u get confused in words??

Ya..my friend..
I got confused with the latter part of the question...
Anyways..Thank u...

[rmbt]

Making this thread sticky and for the reference, here is last year's thread:
http://www.pagalguy.com/forum/quanti...nt-thread.html (The Official CAT 2007 Quant Thread)


All the best.

[riyaaa]

Plz advice some good books for quant for CAT....

[implex]

Originally Posted by riyaaa

Plz advice some good books for quant for CAT....

try material of cl/time

thats good enough
and keep following the threads int his forum

[convivial]

hi frnds..........
thanx 4 ur participation in the thread and helpin it to make this thread sticky....plz carry on the good work.....i will be joinin u all in few days....just busy with my final yr proj
rock on....


cogito,ergo,sum...............