Find number abc
[2121] Find number abc - If c9156 - 211ab = 28ac9 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 77 - The first user who solved this task is Squazz Muntbacker
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Find number abc

If c9156 - 211ab = 28ac9 find number abc. Multiple solutions may exist.
Correct answers: 77
The first user who solved this task is Squazz Muntbacker.
#brainteasers #math
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Why White?

A fresh-faced lad on the eve of his wedding night asks his mother, "Mom, why are wedding dresses white?"
The mother looks at her son and replies, "Son, this shows the town that your bride is pure."
The son thanks his mom, and then seeks his father opinion, "Dad, why are wedding dresses white?"

The father looks at his son in surprise and says, "Son, all household appliances come in white."      

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Harold Stephen Black

Died 11 Dec 1983 at age 85 (born 14 Apr 1898).American electrical engineer who discovered and developed the negative-feedback principle, in which amplification output is fed back into the input, thus producing nearly distortionless and steady amplification. In 1921, Black joined the forerunner of Bell Labs, in New York City, working on elimination of distortion. After six years of persistence, Black conceived his negative feedback amplifier in a flash commuting to work aboard the ferry. Basically, the concept involved feeding systems output back to the input as a method of system control. The principle has found widespread applications in electronics, including industrial, military, and consumer electronics, weaponry, analog computers, and such biomechanical devices as pacemakers.
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