It depends on what kind of calculator you are using. Some calculators only do basic math: adding, subtracting, multiplying and diving, some calculators do basic math and some algebra which are called a scientific calculator and some do all that and graph called a graphing calculator. Whatever calculator you are using, if you are not familiar with what the buttons do, you may have a problem. I will not say that you will flunk the test; however, if a lot of the math problems on the test require you to use the calculator that you are not familiar with, it may take you longer to complete the test. Good luck,