Question 678998
If the monomial cancels one of the trinomial terms, you end up with a binomial (2 terms).

If the monomial combines with one of the trinomial terms, you will have another trinomial as result (3 terms).

If the monomial cannot be combined with any of the trinomial terms, you end up with a 4-term polynomial.

So, most number is 4, and least number is 2.