GMATPREP: Number

cubicle_bound_misfit · Posted: Sun Jun 22, 2008 6:37 pm Post subject: GMATPREP: Number

regards,

egybs · Posted: Mon Jun 23, 2008 9:49 am Post subject:

Is OA, A?

The question doesn't say that k has to be an integer... It can be -.5 for example.

In which case, II would be true, but the original would not be.

If k was an integer, then I believe D would be the right answer.

beeparoo · Posted: Wed Jun 25, 2008 8:02 pm Post subject:

I too think the OA is "A"

anjaligeorge1 · Posted: Thu Jun 26, 2008 5:45 am Post subject:

im getting the answer as D

ektamatta · Posted: Sun Jul 06, 2008 3:55 pm Post subject: oa

what is OA?

ed09 · Posted: Sun Jul 06, 2008 4:31 pm Post subject:

Hi guys,

I dare to say that the answer is A and here is my solution.

(1)
1/(k-1)>0 This inequality works only if k-1>0 or k>1
If k>1, than 1/k>0 is always true.
SUFFICIENT

(2)
1/(k+1)>0 This inequality works only if k+1>0 or k>-1
That is, despite k is neither 1, or -1, nor 0, it still can be negative or positive. This ambiguity of k's sign doesn't let us to be sure of the sign of 1/k. Therefore this statement is INSUFFICIENT.

A is the answer.

Hey, Cubicle Bound Misfit, won't you, plaese, make OA public, finally!
Enough of that keeping folks in suspense! Smile

Best!

cubicle_bound_misfit · Posted: Wed Jul 09, 2008 10:07 pm Post subject:

Sure ED09,
Just a few days before Joker reaches Gotham city let me unveil to you that the OA is A Wink