Find number abc
[6252] Find number abc - If bc17a - 6a575 = 255cb find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 18 - The first user who solved this task is Nasrin 24 T
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Find number abc

If bc17a - 6a575 = 255cb find number abc. Multiple solutions may exist.
Correct answers: 18
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Pete Holmes: Privacy Is Uncool

I think the government made Facebook in an attempt to make privacy uncool. Think about that. I think thats true cause they dont have to tap our phones or survey us when we just yield to them everything, just on our own free will. Home address? Its a little weird, OK. Phone number? Call me. Photos? Photos of everyone I know? Here, let me tag those for you.
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Black American invention

In 1888, a U.S. patent was issued for the railway signal to the Black American inventor, A.B. Blackburn (No. 376,362). The type of signal was that designed to be operated by the wheels of a train. A lever was depressed as a train wheel travelled over it, to remotely operate an alert through a mechanical linkage upon the passing of the train. It was designed for use upon a single track railway line for trains passing in one direction. To provide a signal for trains passing in the opposite direction, a similar apparatus would be applied on the opposite rail. This patent was an improvement in mechanical design of his earlier patent No. 309,517 on 23 Dec 1884, in which he also described how a gong was activated to provide the alert.«[Image: detail from patent diagram showinf device beside a section of rail.]
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