http://www.mba.com/us/gmat-mini-quiz.aspx https://www.petersons.com/graduate-schools/sample-gmat-test-questions.aspx#/sweeps-modal https://magoosh.com/gmat/2016/most-common-gmat-questions/
Hi! There are 41 reading comprehension and critical reasoning questions (Verbal) and 37 data sufficiency problem solving questions (quant). Personally for me I needed to practice the quantitative section much more before taking it because many of the math concepts I hadn't used since high school and needed a refresher.
I found the best way to practice was to take as many practice tests as possible and to brush up on the math formulas since it had been too long. The actual test is taken on a computer and timed, so it's good to practice with time restrictions beforehand so you're used to it when actually taking it.