How many numbers can be formed using digits 1245?

Answer 1

Well honey, you've got 4 digits there, so you can form 4! (4 factorial) which is 24 numbers. That's right, you can make 24 different combinations with those digits. Math can be fun when you've got some sassy numbers to play with!

Answer 2

Assuming each of the given digits can be used only once, the answer is 24. If not, the answer is infinity.