The digit 3 appears 20 times between 1 and 100. This includes occurrences in the tens place (30-39, which accounts for 10 instances) and in the units place (3, 13, 23, 33, 43, 53, 63, 73, 83, and 93, totaling another 10 instances). Therefore, the total count is 10 (from the tens place) + 10 (from the units place) = 20.
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24
The digit appears eleven time from 1 to 100.
11 (eleven)
The number 500 contains the digit 5 one time, specifically in the hundreds place. Therefore, there is one occurrence of the digit 5 in the number 500.
In such cases, you should compare one digit at a time, from left to right, until you find a digit that is different in the two numbers. That is, compare the first digit (after the decimal period) with the first digit, the second digit with the second digit, etc.