<p>Actually, at first glance it looks like you’re defining the range of something, e.g., the 4-6 seeds in the playoffs. You could just as easily have written 4 minus 6, 6 less than 4, 4 take away 6, or 4 (-) 6. That’s sort of the whole point of the problem isn’t it? The problems that arise from poor communication?</p>