Calculate the number 691
[1235] Calculate the number 691 - NUMBERMANIA: Calculate the number 691 using numbers [1, 2, 5, 6, 61, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once. - #brainteasers #math #numbermania - Correct Answers: 32 - The first user who solved this task is Sanja Šabović
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Calculate the number 691

NUMBERMANIA: Calculate the number 691 using numbers [1, 2, 5, 6, 61, 110] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Correct answers: 32
The first user who solved this task is Sanja Šabović.
#brainteasers #math #numbermania
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An out-of-towner drove his car...

An out-of-towner drove his car into a ditch in a desolated area. Luckily, a local farmer came to help with his big strong horse named Buddy. He hitched Buddy up to the car and yelled, "Pull, Nellie, pull!" Buddy didn't move. Then the farmer hollered, "Pull, Buster, pull!" Buddy didn't respond. Once more the farmer commanded, "Pull, Coco, pull!" Nothing. Then the farmer nonchalantly said, "Pull, Buddy, pull!" And the horse easily dragged the car out of the ditch.
The motorist was most appreciative and very curious. He asked the farmer why he called his horse by the wrong name three times.
"Well... Buddy is blind and if he thought he was the only one pulling, he wouldn't even try!"
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Wilhelm Pfeffer

Died 31 Jan 1920 at age 74 (born 9 Mar 1845).Wilhelm (Friedrich Philipp) Pfeffer was a German botanist whose work on osmotic pressure made him a pioneer in the study of plant physiology. With Julius von Sachs, he was a leader in systematizing the fundamentals of plant physiology. In 1877, while investigating cell metabolism, he devised a semi-permeable membrane for the study osmosis. By measuring osmotic pressure, a technique he developed, Pfeffer found that pressure depends on the size of the molecules that are too large to pass through the membrane. Thus, he had a method to measure the size of such giant molecules. However, he was unable to find a mathematical relationship to predict osmotic pressure, which was furthered by the work of van't Hoff.
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