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i got the same answer as you, but i did it by simply plugging in numbers and looking for counterexamples for each statement.

how do you normally approach DS inequality problems like this?

is there a logical process you go through in your head once you see a DS inequality? i tend to have a lot of difficulty with DS problems where it's really tough to see where to start. usually i can get the right answer given a fair amount of time, and most oft the time when i can't solve it i have an educated guess from PoE, but i'd like to know what your thought process is on the tough DS questions and if you have any tips.

thanks!

btw have you taken your gmat yet? you seem like you'd score just fine

i got the same answer as you, but i did it by simply plugging in numbers and looking for counterexamples for each statement.

how do you normally approach DS inequality problems like this?

is there a logical process you go through in your head once you see a DS inequality? i tend to have a lot of difficulty with DS problems where it's really tough to see where to start. usually i can get the right answer given a fair amount of time, and most oft the time when i can't solve it i have an educated guess from PoE, but i'd like to know what your thought process is on the tough DS questions and if you have any tips.

thanks!

btw have you taken your gmat yet? you seem like you'd score just fine

hello plaguerabbit

This is the method I use when solveing DS problems:

The DS Approach:

1. The principles in DS problems are very basic - what usualy throw you off is the need to find fast those basic principles hiding in the stem.

2. Always write something down from the stem. Play with the information given in the stem. See if you can make an equation out of the information or if an equation is already provided to you then see if you can reduce it or change it to something else. This will help you to better understand the principles you are looking for.

3. Then, see if Statement I helps (if you need cover statement II).

4. Then, see if Statement II helps (if you need cover statement I).

5. Don't do the mistake of using info from statement I in II or the other way around !!!

6. Then see if both Statements combined help.

7. Im some cases the answer will be (E) but you might be tempted to think that the answer is (C) and that you don't know enough Quant to get to the answer. Resist this temptation to choose (C) and go with (E) - more often than not you will be right.

8. But beware ! In the real GMAT the answer will rarely be (E) - I think they assume this will be the obvious pick for those who don't know how to solve the problem given.

As for myself , DS was always a big problem, I'm doing very well on PS and have very good quantitative skills - but when I first started solveing DS problems, my success rate was something like 4 out of 10 for me - 'practice makes perfect' - and after a while you start to see the beauty in DS problems (yes ! there is such beauty).

If you have the time I strongly recommend that you try and write your own DS and PS problems (just for practice & fun). write one PS problem and one DS problem, then you will see that PS problems are kind of lame in comparison to DS problems.

TIP: I would use the number picking strategy for this kind of problem.

Check the special cases if in doubt (a special case would be when you pick a number that makes the nominator equal to zero and positive or negative etc...)

TIP: I would use the number picking strategy for this kind of problem.

Check the special cases if in doubt (a special case would be when you pick a number that makes the nominator equal to zero and positive or negative etc...)

Well, the stem of the question specifically says that X is not equal to -Y. This implies that X+Y is not equal to 0. If X is positive, dividing both numerator and denominator by X would not change their signs. So, this is not the special case as you just mentioned.
_________________

for every person who doesn't try because he is
afraid of loosing , there is another person who
keeps making mistakes and succeeds..

E for me too.
After long calculations i have reached this conclusion. It is a tricky q. Hope i find all the questions of such intellectual level.
Because this means i am probably scoring high.