KöMaL 2011 C1082
The first digit of a six-digit number is transferred to the end of the number. Then the first digit of the resulting six-digit number is, again, transferred to the end of the number. The six-digit number obtained in this way is three times the previous number and times the original number. What is the original six-digit number?
Official text KöMaL. Quoted with source.
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