is 1/k > 0?

If k is not equal to 0, 1, or -1, is 1/k > 0?

(1)1/(k+1)> 0

(2)1/(k-1)> 0

Unconfirmed OA is D. I went for A. Please explain.

-2x > 3y, is x negative?

If -2x > 3y, is x negative? (1) y > 0 (2) 2x + 5y - 20 = 0 [spoiler]1) x>-3/2 (x could take negative, 0 or positive)- Not-sufficient 2) 2x+5y=20 (x could take negative, 0 or positive) - not sufficient 1)& 2) not sufficient - I went for E. [/spoiler] One of the answers from a site says D as answe...

sets/venn diagram problem

There are 3 (A,B,C) selectors to select 30 people for a team. A selected 15 people, B selected 17 people, and C selected 20. What is the minimum number of people who are selected by ABC? A, 0 B, 2 C, 3 D, 5 E, 10 Would I be able to use the following formula? Or should I use other method? Please expl...

I'm sorry for digging out an old problem!. Quick questions: If I use the following grid, proposed in one of the GMAT books, I would not get any equation that would conclusively tell me if the equation is going to be even/odd. If we were to use the plugin, How much should we rely on plug ins? Could y...

Coordinate geometry - intersection points?

I know that if 2 equations are given we could find the intersection by solving the equations. But, what if an intersection point (equation) is given, and asked to find out if this is an intersection of 2 lines? 1) gives one of the equations Is that enough information to solve? I'm sorry, if the ques...

I drilled down to D but was confused with independent clause starting with "that".
I read that "That" triggers a dependent clause..
Can someone please explain?

Hi experts, I understand that there is parallelism issue, but I read in this forum that we should avoid starting the sentence with an infinitive on GMAT. Ex: "It is human to err" instead of "To err is human". with that note, how can we be sure that it is the right sentence? Pleas...