Find number abc
[6714] Find number abc - If 3c3ab + 32bc4 = a28a9 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 28 - The first user who solved this task is Nasrin 24 T
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Find number abc

If 3c3ab + 32bc4 = a28a9 find number abc. Multiple solutions may exist.
Correct answers: 28
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Butler

The minister and his wife place an ad for a butler. Early the next morning a nicely dressed young man appears at their front door. The minister asks him, "Can you fix breakfast by 7:00 a.m. every day?"
"Well ... I guess I can."
"And can you make the beds, dust the living room, do the dishes, cut the grass, and polish the silver also?"
"Gee, Sir, I just came by to see about getting married. But if it's going to be that much work, you can count me out!"
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Adding machine

In 1887, a patent for the adding machine was granted to Dorr Eugene Felt of Chicago, Illinois. His Comptometer was the first practical key-driven calculator with sufficient speed, reliablility and economic benefit. He called his original prototype the "Macaroni box", a rough model that Felt created over the year-end holidays in 1884-85. The casing was a grocery macaroni box, assembled with a jackknife using meat skewers as keys, staples as key guides and elastic bands for springs. Door improved his design, producing his earliest commercial wooden-box Comptometer from 1887 thru 1903, leading to the first steel case Model A (1904 that would be standard for the remainder for all "shoebox" models. Electric motor drive was introduced in the 1920's.
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