Here’s a simple number game to play on a rainy day, or while sheltering in place. You and I take turns crossing out numbers from the list {1, 2, 3, …, 9}. The winner is the last person to cross out a ...

Walking on to the deck, you see a whiteboard with numbers and symbols scribbled all over. The novice swimmer might ask, “Am I in math class or at swim practice?” However, the experienced swimmer knows ...