Learn how to determine the rule given the first five terms of a sequence

The video tutorial guides students through solving a number sequence problem. Initially, the teacher explores different methods, including multiplication, to find a formula. After testing and evaluating these methods, the teacher demonstrates that subtracting 4 from the sequence number yields the correct formula. The tutorial emphasizes the importance of trial and error in problem-solving and concludes with the application of the discovered formula.

How did the teacher confirm that the formula n - 4 works?

What conclusion did the teacher reach about the formula after testing it with different numbers?