Find number abc
[6259] Find number abc - If cab64 - b62ca = a8889 find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 15 - The first user who solved this task is Nasrin 24 T
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Find number abc

If cab64 - b62ca = a8889 find number abc. Multiple solutions may exist.
Correct answers: 15
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Silence is the best

Silence is the response to a fool!
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Phototransistor

In 1950, the invention of the phototransistor was announced. This was a transistor operated by light rather than electric current, invented by Dr. John Northrup Shive of the Bell Telephone Laboratories at Murray Hill, N.J. It used a tiny chip of germanium, a semiconductor material, but only a single collector wire. The tip of this wire rests in a small dimple ground into one side of the germanium disk. At this point the germanium disk is only three thousandths of an inch thick. Light focussed on the opposite, un-dimpled side of the disk can control the flow of current in the wire, thus making a control device similar in function to a photo-electric cell.
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