Want to help your third-grader master the basics of 3rd grade math? Here are some of the skills your child will be learning in the classroom. Understand what it means to multiply numbers – for ...

So a third book collecting a wide variety ... play it with at least one other person. What sets your book apart from all the other math puzzle books out there? Ben Orlin: I was surprised to ...

The puzzle presented a series of equations that defied the usual rules of mathematics: “2 + 4 = 8, 5 + 6 = 3, 9 + 5 = 9, 7 + 4 = ?” The mind-bending nature of these puzzles sparked a flurry of ...