90000 of them.
There are 90000.
it s 243..
99999
5^4
There are 90000 5-digit numbers.
89999 Any whole number above 99999 has 6 or more digits, and any whole number below 10000 has 4 or less digits. Since there are only whole numbers involved, it is a simple subtraction of 10000 from 99999.
There are 5*4*3 = 60 such numbers.
10001
one
All of them.
There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
500
There are 5460 five digit numbers with a digit sum of 22.