I thought I was confident with math, as an Econ major in BA. This is why I did not really need much when it came to Quant. But my test results were not so good. Upon meeting Math Revolution, my perspectives on Quant changed! I needed to acquire some tactics to save my time! Math Revolution's approach reduces the time and energy I put in Quant, so that I could keep my energy and pace until Verbal. The variables approach is highly recommended and I think it would prove to be especially useful in this typical situation under COVID 19! Because if you do online-testing, you may not feel the same as you are doing an offline test, so you definitely would need to reduce the time to solve the problems.
People who are anxious about quant scores. Don't try to rush. Start with the basics that Math Revolution teaches you. Just follow their guide. DS & PS separately are also helpful in getting the concepts. If you have the approach in your head, you will be ready to excel in the test and see that you have more than 20 mins left!