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Find number abc

If 9c5cc - ac309 = 30ba8 find number abc. Multiple solutions may exist.

Correct answers: 71

The first user who solved this task is Djordje Timotijevic.

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A secretary walked into her bo...

A secretary walked into her boss's office and said, "I'm afraid I've got some bad news for you."
"Why do you always have to give me bad news?" he complained. "Tell me some good news for once."
"Alright, here's some good news," said the secretary. "You're not sterile."

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Giovanni Amici

Died 10 Apr 1868 at age 82 (born 25 Mar 1786).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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