Babu is from Pakistan, but Brian George is from Israel.
In the first scene inside the Dream Café, Elaine orders Rigatoni, but when she moves tables to work on the test, you see her food is quite clearly a plate of Franks and Beans, not pasta at all. This is what Babu offered Jerry at the start, and what he spills on the test later in the episode.
A minor goof on George's part, but it's impossible to get a 1409 on the SAT because the scores only go in increments of 10.
Babu: Where are people? You see people? Show me people! There are no people!
George: (explaining how he got food on his IQ test) I had a sandwich in my pocket.
Kramer: I meet a lot of women in this jacket. They're attracted to it.
Jerry: (with his sweater over his nose) Bazooka Joe.
Elaine: (to George) Listen, there were too many distractions there. Babu…whatever his name was, and Kramer, I couldn't concentrate.
Jerry: (swaying around mockingly) It was a maaaad-house!
Elaine: Jerry, it was!
Kramer: This guy leaves this jacket at my mother's house for two years. Now, she hasn't seen him since and now he says he wants the jacket back.
Kramer: Well, I'm not giving it back.
Jerry: You know, I could probably shoot him from here. I'd be doing us both a favor.
Kramer: Hey, do me a favor...Some guy comes in looking for me, tell him you don't know where I am.
Jerry: Of course, I always do.
Kramer: No, no it's that guy. He's really been bugging me about the jacket.
Elaine: Just give it back to him.
Kramer: Oh, he'll have to kill me.
Jerry: Go ahead, you're taking the IQ test.
George: Yeah, and she's gonna find out I'm a moron. You know, people think I'm smart, but I'm not smart.
Jerry: Who thinks you're smart?
Monica: Is that the test?
Elaine: Oh, this... um... yeah... here you go.
Monica: Thanks. I hope you do a lot better this time.
George: Oh, hello, professor.
Elaine: George, I cannot believe...
Elaine: No, there has got be a mistake.
George: You should've seen her face. It was the exact same look my father gave me when I told him I wanted to be a ventriloquist.
Jerry: But an 85?
Babu: Our specials are tacos, moussaka, and franks and beans.
Jerry: Well, what do you recommend my good fellow?
Babu: Oh, the turkey.
George: She wants me to take an IQ test.
Jerry: 'Cause you're stupid enough to wear the cologne.
Jerry: How'd you do on the IQ test?
George: (irate) 85!
Jerry: (swaying around) It was a maaaad-house...
Kramer: Anyway, it's been two years. I mean, isn't there a statue of limitations on that?
Jerry: Statute of limitations, it's not a statue!
Kramer: No, it's statue!
Jerry: Fine, it's a sculpture of limitations!
Kramer: Elaine. Elaine! Now you're smart. Is it statute or statue of limitations?
Kramer: Well, I really think you're wrong!
Babu: You bad man! You very, very bad man!
Jerry: Bad man? Could've my mother been wrong?
Jerry: I am special, my mother was right.
Monica: Where did you get the coffee?
George: Where did I get the coffee? Where do think I got the coffee, from the grocery store.
Monica: How did you get there?
George: I walked.
Monica: How did you get out of the apartment? I didn't see you leave.
George: I climbed out the window.
Monica: You climbed out the window?
George: Of course.
Monica: Why didn't you go out the door?
George: The door? Why would I go out the door? The window is right here.
Monica: You are a fascinating man, George Costanza.
Monica: I need to get something.
George: Monica, I'm really focused here, this stuff's a killer.
George: Wish I could.
Elaine: Why do you keep watching?
Jerry: I don't know, I'm obsessed with it. It's like a spider in the toilet struggling for survival. And even though you know he's not gonna make it you, you kinda root for him for a second.
Elaine: Then you flush!
Jerry: Well, it's a spider.
Kramers jacket in this episode is the same one George compliments him on in 'The Parking Garage.'
The Latin phrase "Casus belli" said by Elaine and repeated by Jerry can be translated as "risk of war" or "occasion for war" in English.
When Jerry is in the cafe for the second time, he thinks to himself, "I am great..." while striking the same pose as the bust of Julius Caesar that is on the wall behind him.