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MATH PUZZLE: Can you replace...

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

Correct answers: 286

The first user who solved this task is Thinh Ddh.

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Shoe-recycling shop

I used to work in a shoe-recycling shop.

It was sole-destroying

Author: Alex Horne, Joke was second on August 2013 on Fringe’s best one-liner prize

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Ejnar Hertzsprung

Born 8 Oct 1873; died 21 Oct 1967 at age 94. Danish astronomer who classified types of stars by relating their surface temperature (or colour) to their absolute brightness. A few years later Henry Russell illustrated this relationship graphically in what is now known as the Hertzsprung-Russell diagram, which has become fundamental to the study of stellar evolution. In 1913 he established the luminosity scale of Cepheid variable stars.

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