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Concatenating four copies of 23 produces 23∣∣23∣∣23∣∣23=23232323.23 || 23 || 23 || 23 = 23232323.23∣∣23∣∣23∣∣23=23232323.
Now, suppose you concatenate xxx copies of any positive integer n.n.n.
What is the minimum value of xxx such that the result of this concatenation is guaranteed to be a multiple of 11?
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