Grid-in questions, or student-produced responses, account for about 22% of the 58-question SAT math section. As opposed to multiple-choice questions, where the correct answer is always one of the ...

Contrary to popular belief, graph paper is not just for math class. The best graph paper notebooks are especially helpful for practicing sketches or lettering, bullet journaling, creating ...

The trouble is that there are some 10^16 subsets for each grid. Once again, a little mathematics come in handy. McGuire and co used some clever reasoning to show that certain subsets are ...