Who was the first president of the United States? George Washington.

5 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.

You can hear this line at 00:31:10 in the Blu-ray version of the movie.

Quote context

[...]

- A mental examination? Oh, I don't mind. I've taken dozens of them. Never failed one yet. Know them by heart.

- How many days in the week? Seven.

- How many fingers do you see? Four.

- Muscular coordination test.

- No damage to the nervous system.

- Who was the first president of the United States? George Washington.

- Who was the vice president under John Quincy Adams? Daniel D. Tompkins. And I'll bet your Mr. Sawyer doesn't know that.

- Good night. (2)

(Door Closes)

- Miss Adams, would you get me the Brooks' Memorial Home in, uh, Great Neck?

[...]