Math puzzles are a type of brain teaser that tests the reader's critical thinking and problem-solving skills. These ...

Elon Musk Steps Up Efforts to Cull Federal Work Force Mr. Musk said federal workers must summarize their accomplishments for the week or be forced to leave, borrowing a tactic he used at his ...

In today’s optical illusion challenge, a hidden number 4 is cleverly camouflaged among letter A’s. Can you spot it? This brain teaser tests your observation skills and cognitive sharpness. Experts ...