For Real segment
Season 2, Episode 9
Produced by Jill Peters
Bob Morris
Suzanne Rose
Directed by Bob Morris
Featured character Harry
Math topic Growth by Doubling
Episode Guide
"Harry's Such a Card"
"When Harry Met Bianca"
"Harry Goes Against the Grain" is the For Real Segment for "Double Trouble".


Harry wants to bet that he will win a chess game. His opponent—a boy he’s babysitting – refuses to gamble. But the boy asks Harry which amount he would wager: five dollars, or a bunch of pennies – one on the first square of the chessboard, then double the number of pennies from square to square. When Harry says he’d bet dollars rather than pennies, the boy tells him “The Legend of the Grain of Rice.” In the story the king (played by Harry) forces a peasant (played by the boy) to accept a reward for a good deed he has done. The peasant requests a grain of rice on the first square of the chessboard, two grains on the next, and for each of the remaining squares, twice the number of grains on the square before it. Ultimately, the king owes the peasant 549,755,830,887 tons of rice. That’s enough to cover the surface of the earth twice!

External Links

PBS KIDS - Cyberchase Videos - Harry Goes Against the Grain

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