This holiday-themed brainteaser looks simple, but it's quietly tripping up adults everywhere. A math teacher walks us through ...

Holidays bring celebration, rest and, for many families, long stretches of indoor time. For some, this means tabletop games ...

Here, count with me: 1, 2, 3, 4, 5, 6, 7, 8, 9, T, 11, 12 … Oh, what’s that? You write ten with “zero”? Fair enough. Zero, we have been told, is the ...

The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...

While many scroll past riddles and puzzles without a second thought, there’s a growing number of online users who pause, squint, and dive headfirst into these brain-twisting challenges. For them, a ...