Gmat prep divisibility

Vignesh.4384 wrote:Hi can any one solve this?

OA = E

But i thought B was enough to conclude.

Please explain

I go with B as well..

In such type of question u shud be able to answer either YES or NO.

statement 1. k is divisible by 4.

if its 64 then Yes and if its 12 then its NO.

hence insufficient.

Statement 2. Exactly 4 different prime factors.

take 2*3*5*7 = 210 ..NO .. and its no for all the numbers.

Hence B

hope that helps..

sudhir3127 wrote:

Vignesh.4384 wrote:Hi can any one solve this?

OA = E

But i thought B was enough to conclude.

Please explain

I go with B as well..

In such type of question u shud be able to answer either YES or NO.

statement 1. k is divisible by 4.

if its 64 then Yes and if its 12 then its NO.

hence insufficient.

Statement 2. Exactly 4 different prime factors.

take 2*3*5*7 = 210 ..NO .. and its no for all the numbers.

Hence B

hope that helps..

I am just curious cos the official OA says E .
U think GMAT prep answer could be wrng ?
Please see the attachment below

sudhir3127 wrote:

Vignesh.4384 wrote:Hi can any one solve this?

OA = E

But i thought B was enough to conclude.

Please explain

I go with B as well..

In such type of question u shud be able to answer either YES or NO.

statement 1. k is divisible by 4.

if its 64 then Yes and if its 12 then its NO.

hence insufficient.

Statement 2. Exactly 4 different prime factors.

take 2*3*5*7 = 210 ..NO .. and its no for all the numbers.

Hence B

hope that helps..

hey sorrie abt that confusion...

Its E as the OA says..

as i said A is insufficent..

Statement 2. if we consider the number 2^2*3^2*5^2*7^2.. then its a perfect square (210)^2..

Again this is Yes and No.. so insufficient.

together as well its insufficent.

Hence E.

do let me know if u have any doubts...

I got it now.
Thank u .
I mis understood the word "exact"