"Too Smart" joke

A first grade teacher, Miss Daisy, was having trouble with one of her students. The teacher asks, "Johnny! What is your problem?"
Little Johnny says, "I'm too smart for the first grade. My sister is in the third grade and I'm smarter than she is! I think I should be in the third grade!"
Miss Daisy had enough. She took Little Johnny to the principal's office. While Little Johnny waited in the outer office, the teacher explained to the principal what the situation was. The principal told the teacher he would give the boy a test and if he failed to answer any of his own questions he was to go back to the first grade and behave.
The teacher agreed. Little Johnny is brought in the room. The principal tells Little Johnny and he agrees.
Principal: "What is 3 x 3?" Little Johnny: "9"
Principal: "What is 6 x 6?" Little Johnny: "36"
Principal: "What is 9 x 9?" Little Johnny: "81"
And so it went with every question the principal thought a third grader should know. He looks at Miss Daisy and tells her, "I think Little Johnny can go to the third grade."
Miss Daisy says to the principal, "Let me ask him some questions?"
The principal and Johnny both agree. Miss Daisy asks, "What does a cow have 4 of that I have only 2 of?" Little Johnny: "Legs."
Miss Daisy: "What is in your pants that you have but I do not have?"
The principal's eyes open wide! Before he could stop Johnny's expected answer, Little Johnny says "Pockets."
The principal breathes a sigh of relief and tells Miss Daisy, "Put Johnny in the fifth grade, I missed the last two questions."