: You're a bus driver. At the first stop 4 people get on. At the second ...

: You're a bus driver. At the first stop 4 people get on. At the second stop 8 people get on, at the third stop 2 people get off and, at the forth stop everyone got off. The question is what color are the bus driver's eyes?

Your Answer

My eye colour, which is brown. This is a kind of brain teaser. A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers.
Q: If three hens lay three eggs in three days, how many eggs does a (statistical) hen lay in one day?
A1: One third. (Note: 3 hens = 3 eggs / 3 days → 3 hens = (3 / 3) (eggs / days) → 1 hen = (1 / 3) (egg / days))
A2: Zero or one (it's hard to lay a third of an egg).

Common Sense

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