Question

how many five digit numbers are there in all​

Answer 1

The 1st (smallest) 5-digit number is 10000 and the last (largest) 5-digit number is 99999. Now, 99999–10000=89999 So the total number of 5-digit numbers are- 89999 ...

Answer 2

Answer:

The smallest 5 digit number is 10000. The largest is 99999. 99999 minus 10000 is 89999, but since you have a zero-based count, you have to add 1. That means there are a total of 90000 different 5 digit numbers.