Question 112390
Slot 1 - 26 choices (A-Z)
Slot 2 - 10 choices (0-9)
Slot 3 - 10 choices (0-9)
Slot 4 - 10 choices (0-9)
Slot 5 - 10 choices (0-9)

Total number = 26*10*10*10*10 = 260000