What number comes next?
[249] What number comes next? - Look at the series (2, 3, 6, 21, 231), determine the pattern, and find the value of the next number! - #brainteasers #math - Correct Answers: 56 - The first user who solved this task is Slobodan Strelac
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What number comes next?

Look at the series (2, 3, 6, 21, 231), determine the pattern, and find the value of the next number!
Correct answers: 56
The first user who solved this task is Slobodan Strelac.
#brainteasers #math
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A brunette goes into a doctor...

A brunette goes into a doctor's office and says that her body hurts wherever she touches it. "Impossible," says the doctor. "Show me." She takes her finger, presses on her elbow, and screams in agony. She pushes her knee and screams, pushes her ankle and screams, and so it goes on; everywhere she touches makes her scream with pain. The doctor says, "You're not really a brunette are you?" She says, "No, I dyed my hair. I'm naturally blonde." "I thought so," he says. "Your finger is broken."
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Adding machine

In 1887, a patent for the adding machine was granted to Dorr Eugene Felt of Chicago, Illinois. His Comptometer was the first practical key-driven calculator with sufficient speed, reliablility and economic benefit. He called his original prototype the "Macaroni box", a rough model that Felt created over the year-end holidays in 1884-85. The casing was a grocery macaroni box, assembled with a jackknife using meat skewers as keys, staples as key guides and elastic bands for springs. Door improved his design, producing his earliest commercial wooden-box Comptometer from 1887 thru 1903, leading to the first steel case Model A (1904 that would be standard for the remainder for all "shoebox" models. Electric motor drive was introduced in the 1920's.
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