BRAIN TEASERS

# Calculate the number 623

NUMBERMANIA: Calculate the number 623 using numbers [1, 2, 1, 5, 24, 338] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
The first user who solved this task is Thinh Ddh.
#brainteasers #math #numbermania

### Boarding From What Gate?

At the airport for a business trip, I settled down to wait for the boarding announcement at Gate 35. Then I heard the voice on the public address system saying, "We apologize for the inconvenience, but Delta Flight 570 will board from Gate 41."
So my family picked up our luggage and carried it over to Gate 41. Not ten minutes later the public address voice told us that Flight 570 would in fact be boarding from Gate 35.
So, again, we gathered our carry-on luggage and returned to the original gate. Just as we were settling down, the public address voice spoke again: "Thank you for participating in Delta's physical fitness program.
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### Hans Goldschmidt

Born 18 Jan 1861; died 25 May 1923 at age 62.German chemist who invented the thermite (alumino-thermic) process which was adopted worldwide for welding railroad and streetcar rails, and is still in use for on-site welding. The first track so welded was laid in Essen. This method evolved from his Goldschmidt reduction process that he began investigating in 1893 for the preparation of carbon-free metals. He used the reactions of oxides of certain metals with aluminum to yield aluminum oxide and the free metal. It has been applied to separate chromium, manganese, and cobalt from their oxide ores. Goldschmidt was also a co-inventor of sodium amalgam. His father, Theodor Goldschmidt, founded Chemische Fabrik Th. Goldschmidt which became the modern company, Degussa.«
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