1. Online IQ tests are complete nonsense (i.e., not real).
2. In my experience, there is no one IQ. I actually had mine tested twice. There is a verbal and nonverbal (I guess visual/spatial) score. My verbal dwarfed my nonverbal. I actually read that that can be a sign of autism, funny enough. I'm not quite autistic, though. I'm just self-conscious because I'm ugly and people treated me like a loser from a young age as a result.
If you ever take a test and one of the questions they ask you is, "what's the main material in glass," you're taking an IQ Test.
So whenever I hear someone give one number for an IQ, I assume they're making it up, because in my experience, that's not how it works.