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MATH PUZZLE: Can you replace...

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

Correct answers: 343

The first user who solved this task is Erkain Mahajanian.

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The Only Country

The United States is the only country where a housewife hires a woman to do her cleaning, so she can do volunteer work at the day care, where the cleaning woman leaves her child.
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Philip Leder

Born 19 Nov 1934.American geneticist who has contributed to mapping the genetic code and identifying the genetic basis of cancer. He introduced the oncomouse which was genetically engineered to be a model for the study of cancer. To create this trangenic mouse, the cancer-critical genes known as oncogenes were introduced by injection into mouse eggs. On 12 Apr1988, Leder and Timothy Stewart were granted a U.S. patent on transgenic nonhuman mammals (No. 4,736,866) resulting their work on the oncomouse. He was awarded National Medal of Science in 1991. «

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