michelle dropped her iphone and the screen cracked. she can no longer read the last four digits of anyones number. the last 4 digits of caseys phone number could include 1,2,5,6,8, or 9. if michelle knows that the first digit is NOT 5, the last digit is odd and no digits are repeated, what are the maximum # of phone calls michelle would have to make to call casey.
at first i thought 156
but im thinking its 120