# The “Horse Sense” Mystery - PowerPoint PPT Presentation

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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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## The “Horse Sense” Mystery

By

Richard Holden

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---

There are now a total of 18 horses.

He then gives ½ of them to his oldest son

½ x 18 = 9

Oldest son’s

Next, he gives 1/3 of them to his middle son.

1/3 x 18 = 6

Oldest son’s

Middle son’s

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

Thanks for the use of your horse, Jeb.

You are a mathematical magician, Henry!

### How Did Henry Do It?

• It’s all in the math!

• The 3 fractions never added to one whole

1 =9

218

1 =6

318

1 =2

918

+

17/18