I never heard that clip. Obama says he’s stumped by 9th grade math. That would either be elementary algebra or elements of geometry.
It’s on the record: Obama admits he is a moron in math. Of course, he was probably lying about helping his kids with the math homework. He was just trying to connect with his base, which is certainly math-challenged.
Inability to do Algebra 1 and mediocre Geometry I'd say indicates an IQ under 110 or a seriously fried brain.