How many of the 1000 smallest positive integers are congruent to 1 modulo 9?

Positive integers congruent to 1 modulo 9 are 1,10,19,28, 37, 46, 55,...,991, 1000
This is an arithmetic series where 



Total number of positive integers congruent to 1 modulo 9 is 112.

What is the diagram u didn't post that

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