24
There are 53 = 125 of them. 111, 112, 113, 114, 115, 121 etc.
this is impossible
-4309278
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
10
There are 55 = 3125 of them.
There are 53 = 125 of them. 111, 112, 113, 114, 115, 121 etc.
If it must be three digits and you already have one of them, then there are 100 altogether.... the numbers between 700 and 799, inclusive
24 three digit numbers if repetition of digits is not allowed. 4P3 = 24.If repetition of digits is allowed then we have:For 3 repetitions, 4 three digit numbers.For 2 repetitions, 36 three digit numbers.So we have a total of 64 three digit numbers if repetition of digits is allowed.
this is impossible
-4309278
The biggest 4 digit number that can be made from using the digits of 850236, using a digit at most once, is 8653.
10
2
If this is a homework assignment, please consider trying it yourself first, otherwise the value of the reinforcement to the lesson offered by the homework will be lost on you.There are 60 possibilities that can be made for a three digit number using the numbers 2 4 6 8 and 9. (5 choices for the first digit, 4 choices for the second digit, and 3 choices for the third digit - multiply 5, 4, and 3, and you get 60.)To determine how many of these three digit numbers are smaller than 500, consider that, given 2 4 6 8 and 9, the first digit would have to be 2 or 4. That gives 2 choices for the first digit, 4 choices for the second digit, and 3 choices for the third digit. Multiply 2, 4, and 3, and you get 24.
-- If the same digit may be repeated, then 64 can be made. -- If the same digit may not be repeated, then 24 can be made.
9