Calculate the number 8173
[6932] Calculate the number 8173 - NUMBERMANIA: Calculate the number 8173 using numbers [8, 5, 7, 4, 30, 620] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 11 - The first user who solved this task is Nasrin 24 T
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Calculate the number 8173

NUMBERMANIA: Calculate the number 8173 using numbers [8, 5, 7, 4, 30, 620] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 11
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania
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Second-hand goods

A divorced man bumps into his ex-wife's new husband at a party.

After knocking back a few drinks, he walks over to the guy and sneers: "So, how do you like using second-hand goods?"

"Doesn't bother me," the new husband replies. "Once you get past the first three inches, it's all brand new."

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Oldest fossils

In 1977, American paleontologist Elso S. Barghoorn of Harvard announced the discovery of Pre-Cambian spherical one-celled algae microfossils (named Eobacterium) 3.4 billion years old, earth's earliest life forms. Barghoorn, with J. William Schopf, studied the ancient chert (a flintlike or quartz-like rock) of the Fig Tree formation in Transvaal, South Africa. Rubidium and strontium ratios in the chert are used to establish the age of the rock, and the fossils contained in it. The fossils are a kind of Prokaryotes, organisms with simple cell wall containing organic chemicals, and examples of cell division are visibile in the remains. A huge number of varieties exist today. They all produce oxygen; and, in the Precambrian period, began to change the earth's primoidal reducing atmosphere to the oxygenated one we have today.
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