Good for Practice

The Scholaranium is a good resource for practice after you are done with the concepts. I used GMAT Club as well, both have a different offering. The GMAT club tests are good for advanced problems after you are done with the Scholaranium practice.
This also helps to identify your weak areas. You can see your ability in each section and subsequently work on it individually. Highly recommended if you want to make sure to get a Q50.

For a high Quant score, the important aspect is first answering the easy questions and get the Hard ones as soon as possible and then making sure you get them right. Or else you get stuck at the Q48 mark. That is what this resource you helps you with. Answering the tough questions correctly.