This triangle brain teaser isn’t new, but it had one writer arguing with co-workers all day. Her team’s response to the “How many triangles?” question (truly, one for the ages) ranged all over the place. Some editors saw four triangles; ...

Brain teasers challenge you to test the limits of your mind, but sometimes the answer is much simpler than we make it out to be.  In fact, some are so obvious they are nearly impossible to figure out. Think you ...