There are: 9C4 = 126
0000 to 9999 So answer is 10,000 as 0001 to 9,999 is 9,999 plus 0000 is a number also so 9,999 + 1 = 10,000
95
10 digits are numbers in the billions.
45
there are 899 whole numbers that have three digits.
525
99999
two
There are 5 numbers of 1 digit, 25 numbers of 2 digits, and 75 numbers of 3 digits. This makes 105 numbers in all.
how many numbers exactly have 4 digits ? 8900, 8999, 9000, 9999
10,000
17 digits