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MATH PUZZLE: Can you replace...

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

Correct answers: 2231

The first user who solved this task is Djordje Timotijevic.

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This Town Ain't Big Enough

A lot of conflict in the Wild West could have been avoided...
If cowboy architects had just made their towns big enough for everyone!

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Charles-Adolphe Wurtz

Born 26 Nov 1817; died 12 May 1884 at age 66. French chemist and educator noted for his research on organic nitrogen compounds, hydrocarbons, and glycols. In 1848, he studied a group of compounds related to ammonia called amines and showed they belonged to a type with a nitrogen nucleus. In ammonia a nitrogen atom was bound to three hydrogens, whereas in amines, organic radicals replaced one or more of these hydrogens.

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