Friday 7 September 2018

How many zeros are in all natural numbers from $1$ to $2019$?

Problem :



How many zeros are in all natural numbers from $1$ to $2019$ ?



My attempt :



From $1$ to $100$ we have $11$ zeros




Now from $101$ to $110$ we have $10$ zeros



So from $20$ zeros



Moreover from $101$ to $1000$ we have $201$ zeros



But its very tried I need simple method to calculated this zeros

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