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MATH PUZZLE: Can you replace...

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

Correct answers: 93

The first user who solved this task is Thinh Ddh.

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Tiny Pieces Of Paper

Picking up this tiny piece of paper would take 2 seconds...
But instead I'm going to run it over 100 times with my vacuum at different angles.

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Charles Mauguin

Died 25 Apr 1958 at age 79 (born 19 Sep 1878).Charles-Victor Mauguin was a French mineralogist and crystallographer who was one of the first to make a systematic study of the silicate minerals. Using X-ray diffraction techniques, he determined the structure of a large number of micas. He also published the atomic structure of cinnabar, calomel and graphite and devised a system of symbols for designation of symmetry properties of crystals, adopted (1935) as international standard.«

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