If you are being honest about this question and if I really think that a high school teacher will give this question, then, imagine you have 2 pencils, and you’re friend gives you 2 more. If you count 1,2,3,4 then you get the right answer. The answer is 4.
2 pencils
+ 2 pencils
=4 pencils in total
(I just added pencils to make it easier for you)