A long time ago, there was a king in India. The king's favorite game is chess.

One day, a clever old man came to this place, and the king challenged him to compete with him. The king promised the old man, "If you win this game, you can get any prize."

The old man said, "If I win this game, I want to put one grain of rice in the first square, two grains of rice in the second square, four grains of rice in the third square, and then double the rice in the remaining squares."

"Is that all?" Asked the king. "Don't you like gold or silver?"

"No, just rice," the old man replied.

The king and the old man played games for a long time. Finally, the old man won, so the king ordered his men to collect a bag of rice. He put one on the first square, two on the second square, and so on. The king soon realized the problem-even if there is so much rice in this country, there is not enough rice to put in all the squares.

A long time ago, there was a king in India. The king's favorite game is chess.

One day, a clever old man came to the palace, and the king challenged him to play a game of chess with him. The king promised the old man, "If you win, you can ask for any reward."

The old man said, "If I win the prize, I will put one grain of rice in the first box, two grains of rice in the second box and four grains of rice in the third box, and then double the number of the remaining boxes."

"That's it?" Asked the king. Don't you want gold or silver?

The king and the old man played this game for a long time. Finally, the old man won. So the king ordered his servant to collect a bag of rice. He put a grain of rice in the first box, two grains of rice in the second box, and so on. The king soon realized a problem. Even the rice in the whole country, he still didn't have enough rice to fill these squares.