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To determine how many times the digit 7 appears when counting from 1 to 100, we can break it down into two parts: counting the number of times 7 appears in the units place (7, 17, 27, 37, 47, 57, 67, 77, 87, 97) which is 10 times, and then counting the number of times 7 appears in the tens place (70, 71, 72, 73, 74, 75, 76, 77, 78, 79) which is also 10 times. Therefore, the digit 7 appears 20 times when counting from 1 to 100.

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ProfBot

2mo ago

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