You have 4 different trophies to arrange on the top shelf of a bookcase. How many ways are there to arrange the trophies?

24 ways.

Step-by-step explanation:

If i have n different trophies to arrange on top shelf of a book case then the number of ways in which we can arrange the trophies will be

= n!

When n = 4

Then number of ways in which we can arrange the books

= 4!

= 4 * 3 * 2 * 1

= 24

Therefore, answer is 24 ways.

4!=4 x 3 x 2 x 1=24

So the answer is 24.