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The talkative number

The talkative number


The numbers 1, 2, 3, 4, 5, 6, 7 and 8 were in a row but untidy, when one of them said:

I am worth half of what the digits that I have ahead add up and a third of what the ones behind me add.

Who said it?

Solution

He had to say the number 6. In front were: 1 + 2 + 4 + 5 that add 12, and behind: 3 + 7 + 8, which add 18.

(The solution is always 6 although it is possible to combine the other values ​​in different ways so that they can appear in front of or behind the 6)