Calculate the number 4020
[7865] Calculate the number 4020 - NUMBERMANIA: Calculate the number 4020 using numbers [7, 8, 3, 4, 95, 352] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 0
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Calculate the number 4020

NUMBERMANIA: Calculate the number 4020 using numbers [7, 8, 3, 4, 95, 352] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 0
#brainteasers #math #numbermania
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Three Doors

An airline captain was breaking in a new stewardess. The route they were flying had a layover in another city. Upon their arrival, the captain showed the stewardess the best place for airline personnel to eat, shop and stay overnight.
The next morning, as the pilot was preparing the crew for the day's route, he noticed the new stewardess was missing. He knew which room she was in at the hotel and called her up wondering what happened. She answered the phone, crying, and said she couldn't get out of her room. "
You can't get out of your room?" the captain asked, "Why not?"
The stewardess replied: "There are only three doors in here," she sobbed, "one is the bathroom, one is the closet, and one has a sign on it that says 'Do Not Disturb'!"

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Goldbach's conjecture

In 1742, the Russian mathematician Christian Goldbach dated a letter to Leonhard Euler in which he presented his famous conjecture. Stated in modern terms, Goldberg's conjecture proposes that “Every even natural number greater than 2 is equal to the sum of two prime numbers.”It has been checked by computer for vast numbers - up to at least 4 x 1014 - but still remains unproved. Goldbach also studied infinite sums, the theory of curves and the theory of equations.«[Image: Letter to Euler, in which Goldbach presented his conjecture.]
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