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The “Horse Sense” Mystery

The “Horse Sense” Mystery. By Richard Holden. Farmer Henry had 17 horses. He would like to give his oldest son ½ of them, his middle son 1/3 of them and his youngest son 1/9 of them. How could he accomplish this?. Simple! First, he borrows one horse from his neighbor---.

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The “Horse Sense” Mystery

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  1. The “Horse Sense” Mystery By Richard Holden

  2. Farmer Henry had 17 horses. He would like to give his oldest son ½ of them, his middle son 1/3 of them and his youngest son 1/9 of them. How could he accomplish this?

  3. Simple! First, he borrows one horse from his neighbor--- There are now a total of 18 horses.

  4. He then gives ½ of them to his oldest son ½ x 18 = 9 Oldest son’s

  5. Next, he gives 1/3 of them to his middle son. 1/3 x 18 = 6 Oldest son’s Middle son’s

  6. Finally, he gives his youngest son 1/9 of the horses. 1/9 x 18 = 2 Oldest son’s Middle son’s Youngest son’s

  7. Thanks for the use of your horse, Jeb. You are a mathematical magician, Henry! He then returned the remaining horse to his neighbor

  8. How Did Henry Do It? • It’s all in the math! • The 3 fractions never added to one whole • Instead--- 1 = 9 2 18 1 = 6 3 18 1 = 2 9 18 + 17/18

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