What doe obvious mean?

Like if you were trying to find out what 2+2 is, it's 4, right? That's obvious. Or if you were trying to find your little sister while playing Hide-N-Seek, and she was behind a table that was half her size and she was right in front of you, it would be obvious where she is. Behind the table in front of you. Another Word for obvious is evident, which basically means the same thing. Hope this helps!