Included in this challenging list are puzzles that aspiring astronauts must complete in order to be selected for training.
Can you take on this tricky list of brain teasers, including riddles by Albert Einstein, without making a single mistake?
Brain teasers, riddles, optical illusions, and puzzles are a great way to keep the mind alert.
Understanding how computers process their answers has revealed how us humans can stump them with certain questions.
Here are the mysteries kept by the seven seas!
Watch the math expert try and fail to solve the conundrum that has been around since 1967.
This problem Grant Sanderson (3Blue1Brown) calls both the most elegant and the most comically inefficient is guaranteed to have you working overtime to solve it.
This fun puzzle involves a broom's center of mass and an estimation of each of its sides' weights.
A mathematics professor took to Twitter to pose a puzzle to his followers. Math lovers from everywhere united to step up to the challenge.