Find number abc
[6002] Find number abc - If 8b76a - ab021 = c07bb find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 31 - The first user who solved this task is Nasrin 24 T
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Find number abc

If 8b76a - ab021 = c07bb find number abc. Multiple solutions may exist.
Correct answers: 31
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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This duck walks into a conveni...

This duck walks into a convenience store and asks the clerk, "Do you have any grapes?"

The clerk says no, and the duck leaves. The next day, the duck returns and asks, "Do you have any grapes?" The clerk again says no, and the duck leaves.

The day after that, the duck walks in the store again and asks "Do you have any grapes?" The clerk screams at the duck, "You've come in here the past two days and asked if we had any grapes. I told you no every time that we don't have any grapes!

I swear if you come back in here again, and ask for grapes, I'll nail your webbed feet to the floor!!" The duck left, and returned the next day. This time he asked, "Do you have any nails?"

The clerk replied, "No," and the duck said, "Good! Got any grapes?"

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Ernst Abbe

Died 14 Jan 1905 at age 64 (born 23 Jan 1840).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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