Calculate the number 1311
[4112] Calculate the number 1311 - NUMBERMANIA: Calculate the number 1311 using numbers [2, 7, 5, 2, 55, 526] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 20 - The first user who solved this task is Djordje Timotijevic
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Calculate the number 1311

NUMBERMANIA: Calculate the number 1311 using numbers [2, 7, 5, 2, 55, 526] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 20
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #numbermania
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Emergency Landing

At 8 p.m. one night, a pilot who had run out of fuel made an emergency landing at a top-secret government base. He was quickly surrounded by security and taken inside to be interrogated. The interrogation was grueling because they wanted to make sure it was an unplanned landing and he was not a spy.
The interrogation lasted all night. At 6 a.m. they refueled his plane and let him go with his promise never to return. Four hours later he returned and landed again.
Security met him on the runway. They asked him why he had come back.
'I know I promised never to return but I brought my wife and now you have to tell her where I was all night...'

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Great Zimbabwe

In 1871, Karl Mauch, a German geologist, arrived at the ruins of Great Zimbabwe in what is now southern Zimbabwe in sub-Saharan Africa. Local Karanga tribesmen led Mauch to the wooded savanna location where he viewed 100 acres of granite enclosures. The sinuous coursed granite walls were built without mortar and stood up to 32 feet high. Maunch was the first European to investigate the ruins, but centuries earlier João de Barros had written what he had heard about them (but not himself seen) in his Da Asia (1552) record of Portuguese conquests. Subsequent investigators were inept, racist and attributed the construction to whites, until David Randall-MacIver wrote his account in 1906 of their true native African origin.«[Image: aerial view of the Great Zimbabwe ruins.]
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