Question

How many $5-$ digit numbers are there in all ?​

Answer 1

Step: Find $5$ digit numbers in all

To find total number of $5-$digit numbers, we need to find difference between largest $5-$ digit number and smallest ​

$5-$ digit number​

​largest $5-$ digit number $=99,999$​

​smallest 5-digit number $=10,000$​

​Therefore, required number ​

$=(99,999-10,000)$

​$=89,999$

​In total there are $(89,999+1)$ five -digit numbers. ​

​Hence, there are in total $90,000$ five -digit numbers.