GMAT Exam: How is It Different?
No doubt by this point of your life you have taken tens (or perhaps hundreds) of different exams, tests, and the like, but the GMAT exam is probably quite different from any of them. Since nothing helps to prepare for new stuff better than knowing how it is different from other stuff, let's examine the main differences between the GMAT exam and other tests.
The most obvious difference is that only the GMAT exam score is accepted by most business schools. Some schools may accept a GRE score, but this exception is limited mostly to foreign students.
Next, it's adaptive. The GMAT exam is a CAT (computer adaptive test) test. The computer part of this definition just means the test is administered and scored on a computer. As for adaptive, that means the difficulty of your GMAT exam depends on your performance. The better you do, the harder the test gets and the higher you score; quite logically, the more mistakes you make, the easier the test gets, and the lower you score.
The GMAT exam is not completely knowledge-focused. Instead of explicitly testing which concepts you know well and which you know less well, the GMAT exam focuses on your effective application of those concepts. For example, GMAT Data Sufficiency questions, which are probably exclusive to the GMAT exam, test math without actually asking you to solve a problem and find a definite answer; instead, they ask you to determine what kind of information you would need to have to solve a problem.
It's hard to predict whether you will find the GMAT exam harder or easier than other tests, but you will certainly find it different.