Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

Brain teasers have always held a special place in the hearts of internet users — offering a delightful blend of amusement, ...

On one of China's leading e-commerce platforms, Taobao, searches for "senior-friendly toys" jumped 124 percent year-on-year, ...

In 1979, Hounsfield won the Nobel Prize in Physiology or Medicine for his role in the development of computer-assisted ...

If you're the second type, then you might just be a math legend. There's a new viral math brain teaser that’s testing how ...

All the fun of the larger New York Times Crossword, but you can solve it in seconds.