If you multiply this number by any other number, the answer will always be the same. What number is it?.
A man buys a horse for $60, sells it for $70, buys it back for $80, and sells it again for $90. How much money did he make?
Two fathers and two sons sat down to eat eggs for breakfast. They ate three eggs in total, each person ate one egg. How is this possible?
There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What color are the stairs?
You see a boat filled with people. It has not sunk, but when you look again, you don’t see a single person on board. Why?