The math answer would be 4 but,

it could also be 5. 5 you may ask yourself, yes 5, slogan 2 + 2 = 5 is used in George Orwell's Nineteen Eighty-Four as an example of an obviously false dogma one must believe, similar to other obviously false slogans by the Party in the novel.

Ofc the answer could be anything if you have something clever to say to explain your answer ;)

This question is ask under "science and Maths"category.If its for fun you can answer it in anyway,you want.But here the answer for,

2 + 2

= 4