Best test series for GMAT

I can tell you a bit about our test series. Here are 3 commonly asked questions (related to your question) and our answer to each:

Q. How close to the real test are these GMAT practice tests?
Veritas Prep designed its practice tests to simulate the official GMAT as closely as possible, both in terms of question quality and how the computer-adaptive algorithm determines your ability level and chooses which questions you see. Our GMAT practice tests draw from a pool of more than 1,400 realistic GMAT questions, each of which is measured on multiple attributes that go far deeper than simply “easy / medium / hard.” Given the adaptive nature of our practice tests, no two test instances will be exactly the same.

Q. How are these different from other GMAT practice tests?
Veritas Prep’s practice tests are built on a platform that employs Item Response Theory (IRT), the same system underlying the real GMAT. Unlike more basic approaches that simply count correct and incorrect responses and then generate a score, IRT recognizes that no two GMAT questions are exactly the same. What question you receive at any given point on a test will be dictated by how well you have performed up to that point, and how you answer that question will impact your ability estimate and help determine which question you see next. The system also takes “content balancing” into account, ensuring that you see a mix of question types that are representative of what you will see on the real GMAT, all while gathering as much information about your ability level as possible.

Q. What kind of data goes into these tests to make sure they’re accurate?
Every one of our GMAT questions must be validated across thousands of responses from hundreds of students before it is added to a Veritas Prep practice exam. Veritas Prep has collected more than one million responses from tens of thousands of GMAT students, via both the GMAT Question Bank and by using experimental questions in our computer-adaptive tests (just as the real GMAT collects data). In fact, Veritas Prep collects more than 50,000 new responses each week! Each item is not just validated once, but is constantly recalibrated based on new data. Veritas Prep also regularly measures its practice tests’ scores against the Official GMAT by collecting student feedback, ensuring that its practice exam scores are very close to those generated by the real test.