How many 3-digit numbers can you make with 1, 2, 3, 4, and 5?

Question

I need help on this...

Answer 1

P(5,3)=5!/(5-3)!= 60

Answer 2

For every 2 digits you'll get 3, 3 digit numbers.

For each digit you'll get 4, 2 digit numbers.

4*5=20

*3

=60