Find number abc
[6113] Find number abc - If b7c80 + 792a5 = c2abb5 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 23 - The first user who solved this task is Nasrin 24 T
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Find number abc

If b7c80 + 792a5 = c2abb5 find number abc. Multiple solutions may exist.
Correct answers: 23
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Blonde and computers

Yesterday I came back to my office from Court. There was a new secretary (a very attractive blonde, of course?) in the office down the hall from me. She flagged me down and asked for help. "My floppy drive won't work, can you help me ?" she asked.

I told her I'd take a look and proceeded over to her machine, where I found shredded up clear plastic Baggie-like stuff hanging out of her 3.5" floppy drive. While I spent the next 20 minutes getting out her disk and digging out the plastic, I noticed two guys, John and Dave, in the hall trying awfully hard to keep straight faces. Suspecting some mischief, I asked her how the plastic got into the drive.

"Oh, you mean the condom!", she said.

"Condom???", I asked.

"Yes, John & Dave over there told me to always put a condom on my disk before inserting it, to prevent catching viruses."

By this point, John & Dave were roaring, and it was all I could do to keep from joining them. The "condom" turned out to be a standard 3.5" plastic sleeve. I delicately explained to her that a practical joke had been played, and she shouldn't do that anymore, when she asked (as serious as one could be):

"Does that mean I don't have to stroke it ten times or blow on it either???"

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Vitamin A

In 1947, the first full synthesis route for vitamin A was found by Dutch chemists, Jozef Ferdinand Arens and David Adriaan van Dorp. Later in 1947, a team headed by O. Isler also synthesized vitamin A using a method more suitable to produce commerical quantities. In 1913, Thomas B. Osborne and Lafayette Mendel had shown experimentally with rats that butter contained a factor responsible for growth development. Their work was confirmed (1913) by Elmer McCullum and Marguerite Davis who also identified a fat-soluble nutrient in butterfat and cod liver oil. It became known as vitamin A, and its chemical structure was determined in 1931 by Paul Karrer.«(Ref Arens and van Dorp, Synthesis of Vitamin A aldehyde, Nature 160: 187, 1947)
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