Find number abc
[5257] Find number abc - If a61cb + ab301 = 1accca find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 25 - The first user who solved this task is Djordje Timotijevic
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Find number abc

If a61cb + ab301 = 1accca find number abc. Multiple solutions may exist.
Correct answers: 25
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math
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Second-hand goods

A divorced man bumps into his ex-wife's new husband at a party.

After knocking back a few drinks, he walks over to the guy and sneers: "So, how do you like using second-hand goods?"

"Doesn't bother me," the new husband replies. "Once you get past the first three inches, it's all brand new."

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Ernst Abbe

Born 23 Jan 1840; died 14 Jan 1905 at age 64.German physicist who established a technical and theoretical foundation for the design of optical instruments. The Abbe sine condition enabled designing lenses without spherical aberation's image distortion. He invented the apochromatic lens system (1868), and added the Abbe condenser lens to improve illumination for the microscope (1870). He used homogenous immersion of specimen and microscope objective in cedar oil with matching refractive index to give higher magnification. He invented the Abbe refractometer to measure a refractive index. From 1866, he collaborated with Carl Zeiss to produce high quality optical instruments. He became sole owner of the Zeiss optical works in 1888. From 1878, he also was director of the University of Jena astronomical and meteorological observatories.«
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