Find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.
closed as off-topic by Xander Henderson, user99914, Did, Arnaud D., user21820 Apr 30 '18 at 10:13
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