A person must transport a goat, a Tiger, and bag of grass across a river in a row boat.He can only take one thing at a time. If the tiger is left alone with the goat (on either side of the river), it will eat the goat. Likewise, if the goat is left alone with the bag of grass, it will eat the grass. To solve this puzzle, you must find a way for the farmer to get the Tiger, the Goat, and the bag of grass safely across the river.