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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Good thinking

Two brunettes and a blonde are driving in the desert when, all of a sudden, their car breaks down.

As none of them have any motoring knowledge, they decide to walk. Each of them decides to take one thing with her.

The first brunette takes some food in case she gets hungry, the second brunette takes some water in case she gets thirsty and the blonde takes a car door.

When questioned about her choice, the blonde replies:

"Well, if I get hot, I can roll down the window!"

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Comb-cutting machine

In 1799, the first US patent for a comb-cutting machine was issued to Phineas Pratt of Connecticut as a "machine for making combs." He and his son , Abel Pratt, cut the plates with handsaws and the teeth with circular saws operated by a windmill and waterpower at Ivoryton, Conn. Previous manufacturing of combs in the U.S. began with the first commercial scale comb factory by Enoch Noyes of West Newbury, Mass. (1759), who made combs from flattened animal horns. The first U.S. made ivory comb was made at Centerbrook, Conn. (1789) by Andrew Lord, who cut the plate and teeth with a handsaw.
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