Sure. . I followed the usual approach and used
GMAT club tests as the primary source of practice apart from
OG. I found
OG too simple frankly. Also during inital days when I was building the fundamentals for preparation I did any question bank I can lay my hands on. This includes Kaplan math workbook (older editions from libarary) etc but towards the end I focused on
GMAT club tests completly to built speed and refine concepts.
My preparation will follow the normal learning curve most follow here in terms of books and tests but I would like to mention few other things which helped me:
1. PS and DS: Both are different and approach to questions is different. I struggled with DS initially until I started with Manhattan tests. The key factor in DS is the ability to identify and derive from question stem what is required, before one even looks at the choices. No tests apart from Manhattan test put emphasis on this and these tests include
GMAT club tests where explanations are curt. Once you are able to figure out what you need to know to get the answer of DS question stem the choices will immediately start making sense to you. All other strategies such as subsitution comes after this step.
2. Maths in general is simple and you will not come across some long and tough question that one sees in some of the practice tests. Emphasis is more on understanding the logical application of a concept.
3. I didnt spend time on any calculation shortcuts, memorizing tables or squares etc. They are helpful but they will just help one save some time which wont help if one is struggling in the application of the concept. However if you have good fundamentals you dont need to memorize any of these. You will have adequate time. I completed my maths in second attempt with 8 mins remaining. In the first attempt I used the full time though.
4. there is more to the scoring algo that I couldnt understand or game. But remember not to make 2-3 mistakes in a row at any part in the tests. This means that if you think your answer to a question may be wrong spend some more time on the next question.
Hope this helps and make sense. At the end of the day maths is about practice and more practice.