Need an answer a question that provdes b as an answer if any

Need an answer. a question that provdes b as an answer. if anyone can help please. this is all it gives in the book

Jeopardy! The following are answers to counting questions. Your job is to write a question for each.

Solution

(b) nⁿ - n!

suppose take n any positive integer

let n=3

3^3 - 3!

= 27- (3*2*1)

=27 - 6

= 21

from the above expression we understood that ,

what ever positive integer \'n\' we take its result is a multiple integer of \'n\'