There are four three-digit n...
[4811] There are four three-digit n... - There are four three-digit numbers that share this property: the number itself, its double and its triple contain each digit from 1 to 9 exactly once. For example, 192 is one of them because 192, 384, 576 contain 1 to 9 each once. 273 is another one of them because 273, 546, 819 contain 1 to 9 each once. Can you find the other two numbers and calculate the product of these two numbers? - #brainteasers #math #riddles - Correct Answers: 23 - The first user who solved this task is Djordje Timotijevic
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There are four three-digit n...

There are four three-digit numbers that share this property: the number itself, its double and its triple contain each digit from 1 to 9 exactly once. For example, 192 is one of them because 192, 384, 576 contain 1 to 9 each once. 273 is another one of them because 273, 546, 819 contain 1 to 9 each once. Can you find the other two numbers and calculate the product of these two numbers?
Correct answers: 23
The first user who solved this task is Djordje Timotijevic.
#brainteasers #math #riddles
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Lost Rooster

The priest in a small Irish village was very fond of the chickens he kept in the hen house out the back of the parish manse. He had a cock rooster and about ten hens.
One Saturday night the cock rooster went missing and as that was the time he suspected cock fights occurred in the village he decided to do something about it at church the next morning.
At Mass, he asked the congregation "Has anybody got a cock?" - all the men stood up.
"No No" he said "That wasn't what I meant. Has anybody seen a cock?" - all the women stood up.
"No No" he said "That wasn't what I meant. Has anybody seen a cock that doesn't belong to them." - half the women stood up.

"No No" he said "That wasn't what I meant. Has anybody seen my cock?" - all the nuns stood up.

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Treadmill

In 1822, a treadmill was completed to grind corn at the New York City Prison employing the labour of 8 to 16 prisoners at a time walking on what looked like a very wide, 5-ft diam. paddle wheel. Prisoners held on to a bar and climbed the paddle boards, like endlessly walking up stairs. On each revolution, a bell rang. This was the first of its kind in the U.S., but it was based on a penal idea that had been previously used successfully in Britain. When production began on 23 Sep 1822, it ground 40 to 50 bushels of corn per day. The project was suggested by Stephen Greelet and Isaac Collins, a manager of the Society for the Prevention of Pauperism, and adopted by the mayor. It was abandoned after a few years trial.*«[Image: English prison treadmill design.]
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