Pick a number between 1 and 10.
Is there an official mathematical definition of "between" somewhere when it comes to integers versus reals? I just got caught on a SAT question when it asked for the number of integers between two points of a sequence. I included the end points. Of course, the choices included both with and without the ends. Also, I got caught on another problem when I selected the wrong choice even though I had the right answer. It's kind of a variation of mis-bubbling.