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MATH PUZZLE: Can you replace...

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

Correct answers: 150

The first user who solved this task is Miloš Mitić.

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Seven days to live

Doctor: "I've got some bad news and some really bad news. The bad news is you only have a week to live."

Patient: "What could be worse news than that?"

Doctor: "I've been trying to contact you for the last 6 days."

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Wilhelm Ludvig Johannsen

Died 11 Nov 1927 at age 70 (born 3 Feb 1857). Danish botanist and geneticist whose experiments in plant heredity offered strong support to the mutation theory of the Dutch botanist Hugo de Vries (that changes in heredity come about through sudden, discrete changes of the heredity units in germ cells). Many geneticists thought Johannsen's ideas dealt a severe blow to Charles Darwin's theory that new species were produced by the slow process of natural selection. In 1909, Johannsen proposed that each portion of a chromosome that controls a phenotype be called a "gene" (Greek: "to give birth to").

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