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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Surprise email

A man checked into a hotel.

There was a computer in his room, so he decided to send a mail to his wife.

However, he accidentally typed the wrong email address, and without realizing he sent the mail to a widow who has just returned from her husband's funeral.

The widow decided to check her mail, expecting condolence messages from relatives and friends.

After reading the first message she fainted.

The son rushed into the room, found his mother on the floor and saw the computer screen which read :

To my loving wife, I know you are surprised to hear from me, they have computers here and we are allowed to send mails to loved ones.

I 've just been checked in.

How are you and the kids, the place is realy nice but am lonely here.

I have made necessary arrangement for your arrival tomorrow. Expecting you darling. I can't wait to see you!

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Electrolysis of water

In 1800, English chemist William Nicholson was the first to produce a chemical reaction by electricity. He had been working with Anthony Carlisle, a London surgeon, experimenting with Allesandro Volta's voltaic pile. The new effect was discovered when wires from the poles of the battery being used came into contact with water and bubbles of gas were released as current flowed through the water. Closer examination of the electrolysis showed oxygen was released at the (positive) anode, and hydrogen appeared at the cathode. Electricity had separated the molecules of water. Further, the effect of the amount of hydrogen and oxygen set free by the current was proportional to the amount of current used.«
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