arithmetic
posted by HELP! .
how many threedigit integers greater than 500 contain only odd digits

The first number has to be 5, 7, or 9
The second number has to be 1,3,5,7,or 9
and so on. The number of integers will be 3*5*?
posted by HELP! .
how many threedigit integers greater than 500 contain only odd digits
The first number has to be 5, 7, or 9
The second number has to be 1,3,5,7,or 9
and so on. The number of integers will be 3*5*?