Editor’s Note (4/7/25): The puzzle solution was edited after posting to provide a process with even fewer planes, as ...

A math puzzle is a type of brain teaser that tests the reader's critical thinking and problem-solving skills by challenging them to solve a problem. These challenges have the potential to boost ...

A math question apparently meant for 7-year-olds has left adults befuddled. The bonus math question -- which was first said to have originated on a first-grade ... a circular puzzle with five ...

A math puzzle in the form of a brain teaser tests the ... of the first number from the first digit of the first number. 9 - 7 = 2, and the last digit is 1; therefore, the number becomes 21.