I share the same opinion. E would be my choice.

Perhaps one of the instructors could clarify.

I think I have seen such a question on a kaplan test. However, don't quote me on that. I could have seen it somehwere else.. :-)

Why cant this be a gmat question? You would really have stretch your thinking and spend time to test all cases before selecting E. (The answer is E right?)

This is how I approached the problem. Both Lindsay and Joseph can complete painting in the room in one hour. Lindsay can complete 1/x of the room in one hour. Therefore, Joseph can complete 1-(1/x) or (x-1)/x of a room in one hour. As 20 minutes is one third of an hour (60 min). Therefore Joseph wou...

If z ^n = 1, what is the value of z?

1. n is a nonzero integer.
2. z is greater than 0.

Please post a solution for the same.

OA is C. I feel B should be alright.

Please clarify.

This is GMAT Prep question.

In the figure, what is the ratio of KN/MN?

(1) The perimeter of rectangle KLMN is 30 cm.

(2) The three small rectangles have the same dimensions.

I selected choice E.

OA is C.

Could you please post the solution?

Thanks!

Oh! shucks. I have to consider A and B separately! sometimes get mixed up.. Hope it does not screw me up day after on Test day!

What about -3*2? I say the answer is C.