Mathematical problem
I’m asking for a 10 digit number.
The first digit is dividable by 1
The number made by the first and the second digit is dividable by 2.
The number made by the first to the third digit is dividable by 3.
The number made by the first to the fourth digit is dividable by 4.
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The number made by the first to the tenth digit is dividable by 10.
Yours
Matthias