From adolescence, data show that males outperform females on math tests and tests of math reasoning. These tests are usually age appropriate (i.e., SAT-M and the ACT). The current data with college students and a simple test of arithmetic ability show that males still score higher than females (N = 235) even when performance is measured using a third grade arithmetic test. Therefore, the original finding of a sex difference in math performance from adolescence is a finding that extends beyond more difficult math tests to simplistic ones. That is, the generality and robustness of the effect is established with this study.