The YOLO hashtag has been used to justify doing stupid sh*t in the name of living once, and this test is no exception. A student who either didnt know the answer or just tried unsuccessfully to be funny wrote #YOLO as an answer on a math test, to which the teacher gave a great response. In the teachers defense, that doesnt even look like too challenging of an equation. Kid should have saved his #YOLO for something really ridiculous, like #4. That one looks tough.