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2, 12, 20, 32, 42, 52, 62, 72, 82, 92 so...10.

also 21, 23, 24, 25, 26, 27, 28, 29 so.....18 in total

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12y ago
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Q: How many whole numbers from 1 to 100 contain the digit 2 exactly once?
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