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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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There is more money being spen...

There is more money being spent on breast implants and Viagra today, than on Alzheimer's research. This means that by 2040, there should be a large elderly population with perky boobs, huge erections, and absolutely no recollection of what to do with them.

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Étienne-François Geoffroy

Died 6 Jan 1731 at age 58 (born 13 Feb 1672).French chemist, who was the first to recognize the relative fixed affinities of reagents for one another. He composed tables (1718) listing the relative affinities of different reagents for particular substances, showing how one acid displaces another acid of weaker affinity for a specific base in the salt of that base. (These tables stood for most of the 18th century, until Claude-Louis Berthollet demonstrated that reactions instead depend upon the initial relative quantities of the reactants and physical conditions during the reaction.) Geoffroy considered the quest for the philosopher's stone (a substance capable of transforming base metals into gold) a delusion, but he believed that iron could be formed during the combustion of vegetable matter.

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