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

My eye colour, which is brown. This is a kind of brain teaser. A strongbrain teaser/strong 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.br /Q: emIf three hens lay three eggs in three days, how many eggs does a (statistical) hen lay in one day?/embr /A1: emOne third./em (Note: 3 hens = 3 eggs / 3 days → 3 hens = (3 / 3) (eggs / days) → 1 hen = (1 / 3) (egg / days))br /A2: emZero or one/em (it's hard to lay a third of an egg).