Question

How many digits are required to write first 500 natural

Q: Answer-How many digits are required to write first 500 natural numbers?

Single digit numbers are from 1 to 9 so in that total digits used 9. From 10 to 99 there are 90 numbers of 2 digits , so here digit used 90 2 180. From 100 to 500 there are 401 numbers of 3 digits 3 401 1203 as all are of 3 digit number. So number of digits required to first 500 natural number 91801203 1392