The matching mittens are: 1 and 9 2 and 10 3 and 4 5 and 14 6 and 7 8 and 15 11 and 13 Winter math This Christmas ...

It might not seem like there's enough information to solve these logic puzzles at first—but that's part of the fun!

By Siobhan Roberts “Math is power” is the tag line of a new documentary, “Counted Out,” currently making the rounds at festivals and community screenings. (It will have a limited ...