security code combinations

[daniel3777]

i was wondering how to calculate the posibilities that a security code could be. For instance if a jet ski security code consists of 4 numbers. each digit can be any number 1 through 5.

how many combinations can that make?
p.s. - im not trying to steal a jet ski; im just wondering.

[Muzza]

Apply the multiplication rule. You have 5 choices for each digit in the code, and there are 4 digits. There are 5*5*5*5 = 5^4 = 625 possibilities.