6*5*4*3*2*1 = 720
3,124,550 possible combinations
im assuming that any charcter can be a number or a letter: (24letters*10 possible numbers)^(4 digits)= 3317760000 possible combinations.
Depends on how many were possible. For instance on a test of 100 questions 80% would be a B.
10*9*8 = 720
Five
The number is 26*25*24 = 15600.
It depends on the letters and also on the words that have been placed on the board.
64 different arrangements are possible.
There are 172 different arrangements.
There are 12 two letter arrangements of the letters in PARK.
6720
181440
Any 2 from 26 = 26 x 25 = 650 if ab and ba are regarded as separate, otherwise 325.
12
5! = 5x4x3x2x1 = 120
There are 5!/2! = 60 arrangements.