Distinct means different from all others. So there can be no repeated digits. Thus, 4124 is not possible because there are two '4' digits.
There are 9 ways to choose the first digit (1-9, as 0 is not possible). Subsequently, there are 9 choices for the second digit, since there are 10 possible digits (0-9), but we can't pick the same one as the first digit. Next, there are 8 ways to choose the 3rd digit, since we can't choose the same as either of the first two digits. Finally, there are 7 ways to choose the 4th digit.
The answer is 9 * 9 * 8 * 7 = 4536.
9*9*8*7 = 4536
405
10*9*8=720
9000 integers.
31.how do you solve?
There are 120 of them.
9*9*8*7 = 4536
952 of them.
An infinite amount
405
10*9*8=720
There are 125 of them.
How many
The sum of all the integers between 1,000 and 2,000 is 1,498,500.
648
There are 2828 integers between 1000 and 9999.
1, 2, 4, 5, 8, and 10, so only 6 digits.