A certain street has 1000 buildings. A sign-maker is contracted to number the houses from 1 to 1000. How many zeroes will he need?
Question
Solution 1
To solve this problem, we need to consider how many times the number '0' appears in each set of numbers:
- From 1 to 9, there are no zeroes.
- From 10 to 99, '0' appears 10 times in the units place (10, 20, 30, ..., 90) and 10 times in the tens place (10, 20, ..., 90). So, a total of 20 times.
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