BB..please clarify..when you say you can check out one of our tests..M/V...are you referring to GM Challenges? GMAT Club Tests
I am under the assumption these challenges are just collections of hard questions, not something one should use as a simulated test....
are not collections of questions.
These tests are assembled as tests and split by category (math and verbal) to help focus on each of the areas. Each test has a composition of what one would find in a typical test (arithmetic, geometry, stats, probability, etc). They are timed as a test, though untimed mode can be set, have the same question format, and produce a percentile-based score.
Currently they are not adaptive, but there are definitely plans to make them so soon.
Founder of GMAT Club
Just starting out with GMAT? Start here... | Want to know your GMAT Score? Try GMAT Score Estimator
Need GMAT Book Recommendations? Best GMAT Books
Co-author of the GMAT Club tests
Have a blog? Feature it on GMAT Club!
Get the best GMAT Prep Resources with GMAT Club Premium Membership