There is only 1, the number 54.
952 of them.
1, 2, 4, 5, 8, and 10, so only 6 digits.
An infinite amount
192 ways
648
There are 120 of them.
How many
There are 125 of them.
52
There are 45 integers between 11 and 999999 which consist of only one digit being repeated. There are 831430 integers that contain at least one repeated digit.
9*9*8*7 = 4536
10*9*8=720
There are 870 such numbers.
There is only 1, the number 54.
952 of them.
1, 2, 4, 5, 8, and 10, so only 6 digits.