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MATH PUZZLE: Can you replace...

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

Correct answers: 297

The first user who solved this task is Pratima Singh.

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Chess With My Dog

Me: I taught my dog to play chess.
Friend: He must be very smart?
Me: Not really, I beat him two games out of three!

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Joseph-Louis Proust

Born 26 Sep 1754; died 5 Jul 1826 at age 71.French chemist who proved (1808) that the relative quantities of any given pure chemical compound's constituent elements remain invariant, regardless of the compound's source, and thus provided crucial evidence in support of John Dalton's “law of definite proportions,” which holds that elements in any compound are present in fixed proportion to each other.

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