Find number abc
[6162] Find number abc - If 8ab0c - cb715 = c288a find number abc. Multiple solutions may exist. - #brainteasers #math - Correct Answers: 21 - The first user who solved this task is Fazil Hashim
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Find number abc

If 8ab0c - cb715 = c288a find number abc. Multiple solutions may exist.
Correct answers: 21
The first user who solved this task is Fazil Hashim.
#brainteasers #math
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Last year I replaced several w...

Last year I replaced several windows in my house and they were the expensive double-pane energy efficient kind. But this week I got a call from the contractor complaining that his work has been completed for a whole year and I had yet to pay for them.
Boy oh boy did we go 'round. Just because I'm blonde doesn't mean that I am automatically stupid. So, I proceeded to tell him just what his fast talking sales guy had told me last year. . that in one year the windows would pay for themselves. There was silence on the other end of the line so I just hung up and I haven't heard back. Guess I must have won that silly argument.
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Safety lamp

In 1816, Sir Humphry Davy's safety lamp was first used in a coal mine. Deadly explosions had been a continual hazard caused by the flammable gas, methane, leaking out of the coal seams ignited by the flame of a miner's lamp. There had been previous attempts by others to make a safety lantern. Davy applied a scientific approach to determine the suitable fineness of wire gauze placed around the flame which would avoid ignition of flammable gas outside. He determined that the holes in the gauze should be less than 1/22 inch in diameter, and that the wire itself should be between 1/40 to 1/60 inch thick. Since the flame changed colour in the presence of methane, it also served as a warning to the miner to take protective action.«[Image: Davy safety lamp, circa 1816.]
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