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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It was a baby mosquito's firs...

It was a baby mosquito's first day to fly out from home.
When the mosquito came back home later that day, the father mosquito asked, "How was your journey?"
The baby mosquito replied, "It went great, everyone was clapping for me!"
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Vulcanized rubber

In 1844, Charles Goodyear received another patent (U.S. No. 3,633) for "An Improvement in India-Rubber Fabrics." This way of processing india-rubber added white lead to the sulphur and heating method he patented 24 Feb 1839. He had spent several years, since going bankrupt in hardware, trying to improve natural rubber, which became sticky in summer heat and brittle in the winter. He had experimented to coat it with a powder to make it less sticky when he accidentally dropped a mixture of natural rubber and powdered sulphur on a hot stove in Woburn, Massachusetts. The heat completed the process. Despite the value of his inventions, he died in poverty in 1860. (His earliest patent, 17 Jun 1837 used metallic solutions.)
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