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MATH PUZZLE: Can you replace...

MATH PUZZLE: Can you replace the question mark with a number?

Correct answers: 213

The first user who solved this task is Sanja Šabović.

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Counting sheep

The sheep dog says to the farmer, “Here are your 20 sheep.”

The farmer says, “but I only have 17 sheep.”

“I know,” says the sheep dog, “I rounded them up.”

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Thomas Burr Osborne

Died 29 Jan 1929 at age 69 (born 5 Aug 1859).American biochemist who made major contributions to understanding the chemistry of vegetable proteins. He and his collaborator Lafayette Mendel showed that tryptophan and lysine are essentials in diet for healthy growth. They discovered another essential, a fat-soluble substance, in butter (now known as vitamin A). Similar work revealing that substance, published three weeks earlier was done by Elmer Verner McCollum and Marguerite Davis, who also found it in egg yolks (1912).

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