Permutations & Combination Problems - Need Help

Sep 2008
Jason bought a combination lock. There are 25 numbers on the lock. Jason must use four numbers to create the combination. How many different ways could the numbers be arranged to create the four number combination? (Frustrated please help (Angry))
Nov 2008
Assuming that the order in which the numbers are placed is important (after all this a combination lock) and that he can repeat the numbers, then there are 25^4 possibilities (25 for each position).