Hi sqazi01,

The number of questions from any given category will vary a bit depending on your level of performance and the Randomizer that's built into the GMAT.

That having been said, each of the categories that you've listed will account for a significant number of questions, so they're ALL areas that are worth spending time on.

GMAT assassins aren't born, they're made,
Rich

If your prep time is limited, it's a good idea to focus on concepts that have the greatest return on investment. These are concepts that are tested frequently and require the least amount of time to learn. In my opinion, the include:
- Data Sufficiency strategies [If you're looking for some extra DS resources, we have a free set of videos that cover everything you need to know: https://www.gmatprepnow.com/module/gmat-data-sufficiency]
- Percent
- Integer Properties
- Powers/roots
- Algebra
- Geometry

Aside: I see a lot of students spending A LOT of time agonizing over concepts like Probability and Counting, when these topics can take a long time to master and, relatively speaking, are not often tested.

Cheers,
Brent