Question

The teacher gave this pattern to the class: the first term is 5 and the rule is add 4, subtract 1. Each student says 5. Victor is tenth in line. What number should Victor say?

Answer 1

Hi!
I think that there is a mistake in your question: only the first student says 5, not each student.

From the second student on, the student will say the previous number +4-1, that is the previous number +3.

So the second student will say 8, third 11, etc...

this will be repeated 9 times when Victor says his number (the first student doesn't have to change anything), so the number will increase 9 times:  so it will increase 9*3=27

So Victor will say 32: 27 plus the original 5.

And  all the numbers said will be:

5
8
11
14
17
20
23
26
29
32 -  Victor