Independence Day Quiz Okay you good-looking, red-blooded American....Let's see how you do on this test…24 out of 30 is considered a passing grade. . Have a good day. Supposedly 96% of all high school Seniors FAILED this test. AND if that's not bad enough, 50% + of all individuals over 50 did too!! Take the test and be surprised at what we don't know. 28 HECK.