You have to memorize the metric system and know how to set them up and solve the problem. I took my Hesi early June and had a few metric system problems. There were a lot of word problem and problems with decimals on my test so make sure you know how to do both well. Make sure you know what your school wants you to know. For example, I didn't need chemistry, physics or biology. You need to find out if there is critical thinking on your test. I didn't know it was on my nursing exam and didn't prepare for it. I pray about this part of the test and ended up with 85% on it. My test was four hours long. I had 30 anatomy questions, 55 math questions, around 45 critical thinking questions, and 50 reading questions. If you don't feel prepared, don't take it. I knew I got only two chances to pass the test, so I didn't take it until I felt ready. Good luck, lovely.