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If you count 11 as 2 instances, the digit 1 appears 18 times if you don't count 10, 19 times if you do.

10,11,12,13,14,15,16,17,18,19,21,31,41,51,61,71,81,91

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7y ago

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Between 10 and 99 it appears 18 times.

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7y ago
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Q: How many times does the number 1 appear between 10 and 99?
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