Calculate the number 721
[6555] Calculate the number 721 - NUMBERMANIA: Calculate the number 721 using numbers [2, 4, 2, 7, 49, 231] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 10 - The first user who solved this task is Nasrin 24 T
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Calculate the number 721

NUMBERMANIA: Calculate the number 721 using numbers [2, 4, 2, 7, 49, 231] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 10
The first user who solved this task is Nasrin 24 T.
#brainteasers #math #numbermania
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Phobia

A man went to a psychiatrist for his phobia.
"Doc," he said, "I've got trouble. Every time I get into bed, I think there's somebody under it. I get under the bed, I think there's somebody on top of it. Top, under, top, under. You gotta help me, I'm going crazy!"
"Just put yourself in my hands for two years," said the shrink, "Come to me three times a week, and I'll cure your fears."
"How much do you charge?"
"A hundred dollars per visit."
"I'll sleep on it," said the man.
Six months later the doctor met the man on the street.
"Why didn't you ever come to see me again?" asked the psychiatrist.
"For a hundred buck's a visit? A bartender cured me for ten dollars."
"Is that so! How?"
"He told me to cut the legs off the bed!"

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Paul Joseph Cohen

Born 2 Apr 1934. American mathematician who received the Fields Medal (1966) for his fundamental work on the foundations of set theory. Cohen invented a technique called "forcing" to prove the independence in set theory of the axiom of choice and of the generalised continuum hypothesis. The continuum hypothesis problem was the first of Hilbert's famous 23 problems delivered to the Second International Congress of Mathematicians in Paris in 1900. Hilbert's famous speech The Problems of Mathematics challenged (then and now) mathematicians to solve these fundamental questions and Cohen has the distinction of solving Problem 1. He also worked on differential equations and harmonic analysis.«
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