King Hiero of ancient Greece once asked a crown maker to make him a (gold) crown. At first, the King was very happy with it, but later he (doubt) that it was real, so he sent it to Archimedes and asked him to find out the (true).
It seemed difficult to solve the problem, but Archimedes got an idea while he was (bath). He asked the king some gold of the same weight the crown. Then he put two pots into two big bowls and filled both pots water. He put the gold into one pot, and some water ran into the bowl. He put the crown into other pot, and even more water ran this time.
Then Archimedes proved that the crown was not (complete) made of gold.
