Get started solving the classic number puzzle with tips from some of the best solvers in the world. By Isaac Aronow Everybody can solve a hard Sudoku. Maybe not right now, maybe not without some ...

Your grade school teacher probably didn’t show you how to add 20-digit numbers. But if you know how to add smaller numbers, all you need is paper and pencil and a bit of patience. Start with the ones ...

Artificial Intelligence has learned to master language, generate art, and even beat grandmasters at chess. But can it crack the code of abstract reasoning --t hose tricky visual puzzles that leave ...

Believe it or not, emotional reasoning is neither rare nor uncommon. It is present when we feel jealous and conclude that our partner is cheating on us, with no reason or evidence to back this ...