Data Sufficiency

hie, i am alwiz confused with DS questions that are involved with
arithmetic , divisibility and inequalities
which appears alot in GMAT

for instance an arithmetic and inequality question

a) if x is an integer, is xlxl <2^x? or (b) is lxl=y-z

for instance a divisibility question

(a) if x is a positive interger, what is the remainder when x is divded by 18.

does anyone out there has tips regarding these DS questions on how to conquer them or any additional info on them

thanks for the help in advance appreciated

Hi

In these type of questions following things will help you lots.

* Those who have lots of fear of this kind of questions.

First break the all the equations and consider all the cases (Negative , Positive) . By doing this you will get @max 4 possible combinations.

Now take total 5 combination of numbers (++, + - , -+ , -- and keep both no. same) .

Try to evalute every posibilties and you will def. get answer.

Thanks
Vishal Shah