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MATH PUZZLE: Can you replace...

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

Correct answers: 207

The first user who solved this task is Rutu Raj.

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Greg Giraldo: Dodgeball Skills

Part of growing up is learning your strengths and weaknesses. What better way to figure out that hand-eye coordination aint your thing than by getting drilled in the mouth by a red, rubber ball? You only gotta get beaned in the face so many times before you figure out, I better hit the books because this is not working out.

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Giovanni Amici

Born 25 Mar 1786; died 10 Apr 1868 at age 82.Giovanni Battista Amici was an Italian physicist, microscopist, astronomer and optical instrument designer who is best known for his invention of the achromatic lens. He also introduced the Amici-Bertrand lens, a lens for the inspection of an objective's rear focal plane. The lens system he designed for a new type of microscope in 1837 improved the magnification, capable of up to 6000 times. In 1840, he also introduced an immersion system for microscopes; the lowermost lens was immersed in a drop of oil to reduce improve clarity. He improved the design of mirrors used in reflecting telescopes. As a biologist, he investigated the sexual function of flowers, in particular he clarified the mechanism of the pollination of orchids.«[DSD gives death year 1868. EB gives death year 1863.]

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