Question

How many 6 digit are in all?
How many 7 digit are in all?

Answer 1

The smallest six digit number is 100000. and the largest six digit number is 999999. So, total number of six digit numbers = 999999 – 100000 + 1 = 900000.

The smallest seven digit number is 1000000. and the largest six digit number is 9999999. So, total number of six digit numbers = 9999999 – 1000000 + 1 = 9000000.