how do you kill a black mathematician ? with a hypotenuse .
What are you implying here?  Is there something dangerous about math that affects black people?
no, I'm kidding. I'm only saying black math geniuses are less smart than other math geniuses.
This statement reflects an unfair racial stereotype that black people are inherently less smart than whites.  This is clearly not the case, as there are indeed many black people who have become professional mathematicians.  People of all races run the gamut in terms of intelligence, and this should be recognized.