gre vs gmat?

To get admitted to any master program(normal one) in US, GRE General Test is usually an admission requirement. (No matter what u major in.) You need to check out your university's handbook for specific college's GRE Subject Test requirements.

GRE consists of a General Test and Eight Subject Test.
The General Test measures your verbal reasoning, quantitative reasoning, critical thinking, and analytical writing skills.
The eight Subject Test measures your knowledge of Biochemistry, Cell and Molecular Biology, Biology, Chemistry, Computer Science, Literature in English, Mathematics, Physics and Psychology.
The exam cost $130 in US, $175 in HK,China

Now, if you are applying for master program in business or MBA, you need to take additional test call GMAT or Graduate Management Admission Test. The GMAT exam consists of three main parts, the Analytical Writing Assessment, the Quantitative section, and the Verbal section. This test does not test your knowledge of business though.
The exam cost $250USD worldwide.

If you are applying for medical doctor program in US, then you need to take MCAT exam.

If you apply for teacher program in US, i think you need to take CBEST test.

So there are many different tests...........

Getting a good grade is essential to gain admission to top universities. Admission use these test score to supplement your academic performance. These days the competition is very tough. These tests are recognized worldwide.

There are many ways to prepare for your exams. You can find many preparation book in library, or check out amazon.com, search for GRE, GMAT. If you have time and have money, you can sign up for classes. In US, Kaplan is one of the better ones. Start earlier the better...good luck!

I DON"T KNOW VERY DIFFICULT