Calculate the number 4915
[4295] Calculate the number 4915 - NUMBERMANIA: Calculate the number 4915 using numbers [1, 6, 5, 5, 17, 181] 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 Manguexa Wagle
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Calculate the number 4915

NUMBERMANIA: Calculate the number 4915 using numbers [1, 6, 5, 5, 17, 181] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 20
The first user who solved this task is Manguexa Wagle.
#brainteasers #math #numbermania
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We noticed that all the waiter...

We noticed that all the waiters in this New York restaurant carried two spoons in their vest pocket. Naturally, we were curious. We asked a waiter why.
'Sir, as a result of an efficiency study by the management, it was determined that the most frequently dropped silverware item was a spoon. Therefore, all the waiters carry two spoons so that the item can be instantly replaced.' As he was explaining that we noticed a string hanging out of the fly of his pants. So, we asked about that.
'Sir, that's another efficiency study result. When we have to go to the bathroom, we use the string to pull ourselves out and aim. Therefore, we do not have to stop to wash our hands.' We replied, 'I understand how you can get yourself out and aim, but how do you get yourself back in.' 'Well,' replied the waiter, 'I don't know about the other guys, but I use the two spoons!'
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Donald R. Griffin

Died 7 Nov 2003 at age 88 (born 3 Aug 1915). Donald Redfield Griffin was an American biophysicist, known for his research in animal navigation, animal behaviour, and sensory biophysics. With Robert Galambos, he studied bat echolocation (1938), a term he coined (1944) for how the bat's ears replace eyes in flight guidance. Using specialized high-frequency sound equipment by G.W. Pierce, they found that bats in flight produced ultrasonic sounds used to avoid obstacles. In WW II, he used physiological principles to design such military equipment as cold-weather clothing and headphones. Griffin also worked extensively on bird navigation. In the late 1940s, he flew in a Piper Cub to observe the flight paths of gannets and gulls. In his career, he pioneered rigorous techniques to study animals in their natural environment.«
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