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All the whole numbers from 1 to 100 are written in a row next to each other. How many 7s are there in the formed number?
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All the whole numbers from 1 to 100 are written in a row next to each other. How many 7s are there in the formed number?

User Kwoodson
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7, 17,27,37,47,57,67,70,71,72,73,74,75,76,77(27’s in this one),78,79,87,97
20 7’s in 1-100
User Dave Flynn
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