Homer sees the children’s television series character Barney the dinosaur on TV.
Barney: Two plus two is four / Two plus two is four / Two plus two is four . . .
Homer: Heh heh heh heh! I can see why this is so popular! Look at him!
Due to Bart’s changed temporarily appearance (wearing eyeglasses, medicated scalp salve and orthopedic shoes), he is targeted by the bullies at school. Bart’s gifted classmate Martin Prince leads Bart to a safe haven at school where they “can work on [our] extra credit assignments without fear of reprisal.” A student writes the quadratic formula on a wall, which contains other mathematics including arithmetic and algebra.
In a public men's bathroom, Homer finds a pair of eyeglasses. He puts them on a points to his head.
Homer: The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side.
Man in stall: That’s a right triangle, you idiot!
Homer: D’oh!
See the Scarecrow classroom worksheet.
On the television program Smartline, Kent Brockman interviews Homer, who has organized a group of citizens to patrol the city, prevent crime and detain perpetrators.
Kent: Mr. Simpson, how do you respond to the charges that petty vandalism such as graffiti is down eighty percent, while heavy sack-beatings are up a shocking 900%?
Homer: Aw, people can come up with statistics to prove anything, Kent. Fourfty [sic] percent of all people know that.
Having unintentionally gotten Apu fired from the Kwik-E-Mart. Homer vows to speak with the head of the Kwik-E-Mart corporation to help get Apu his job back.
Apu: But, sir, the head office is in India.
Homer: OK.
Lisa: Dad, that's over 10,000 miles away.
Homer (annoyed): I'm aware of that!
Lisa: That's over 16,000 kilometers.
Homer: D’oh!
After Bart wins an elephant, Homer tries to make money off of it to pay to take care of it.
Homer: Uh, Milhouse saw the elephant twice and rode him once, right?
Mrs. Van Houten: Yes, but we paid you four dollars.
Homer: Well, that was under our old price structure. Under our new price structure, your bill comes to a total of seven hundred dollars. Now, you've already paid me four dollars, so that's just six hundred and ninety-six dollars more that you owe me.
Mr. Van Houten: Get off our property.