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Calculate the number 4575

NUMBERMANIA: Calculate the number 4575 using numbers [5, 5, 2, 3, 94, 614] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.

Correct answers: 11

The first user who solved this task is Thinh Ddh.

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Crazy people don't know they are crazy

Crazy people don't know they are crazy, I know i'm crazy therefore i'm not crazy. Isn't that crazy.

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Davy's safety lamp

In 1815, English chemist, Sir Humphry Davy of London patented the miner's safety lamp. Miners at work constantly met firedamp, an explosive mix of methane gas and air, during the working of coal. This was an almost insurmountable obstacle to the working of many of the collieries until the discovery of the safety lamp. The flame of the safety lamp is surrounded by a copper or iron gauze cylinder, with openings no more than 1/24-inch. Such a fine gauze prevents flame passing through, but fails if coarser. The wire absorbs or conducts away the heat of the flame contained inside the lamp so it does not explode gas outside the lamp. If firedamp is present, a pale blue flame appears around the central flame. This warns a miner to leave the area immediately!

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