5
If you're allowed to repeat digits, then there are (4 x 4 x 4 x 4) = 256 .
If you're not allowed to repeat digits, then there are (4 x 3 x 2 x 1) = 24 .
There are 12 such numbers.
4! = 24 ■
9,000
3024
There are 7200 such numbers.
7000 - 999 ie 6001 four digit numbers
900 numbers
There are 12 such numbers.
4! = 24 ■
9,000
3024
90
2240
There are 7200 such numbers.
how make the answer im don/now
3*3*2*1 = 18 of them.
625 if numbers can have leading 0s, 500 otherwise.