Brain Game: Prime Time
I try very hard to produce original content for the Brain Game, so it's nice to have the occasional holiday. In fact, our Web editor, Jason, recently suggested that weÂ ask readers to send in their favorite puzzles. That way, other puzzlemakers couldÂ earn exposure on mentalfloss.com, andÂ Kara and IÂ could take our first real break in over a year. Selfishly, we jumped at the suggestion. So if you've got a puzzle that you'd like to share, please send it to me at email@example.com. If your submission makes the cut, I'llÂ give you full creditÂ and will also send you the T-shirt of your choice from the mental_floss store. (That's how badlyÂ I need a vacation.)
StudentsÂ should know this, but here's a quick refresher for those of us who don't: A prime number is one that isÂ evenly divisble only by itself and 1. With that knowledge in mind, try your hand at today's Brain Game:
What is the largest three-digit prime number?
THE ANSWER:Â 997.