Find 5 digit numbers in allTo find total number of 5−digit numbers, we must determine the difference between the biggest five-digit number and the smallest 5− digit number largest 5− digit number =99,999 smallest 5-digit number =10,000 Hence, required number =(99,999−10,000) =89,999 In total there are (89,999+1) five -digit numbers. Therefore, there are 90,000 five-digit numbers in total.