Little Johnny knows his number

Little Johnny knows his number

The teacher asked little Johnny if he knew his numbers.

"Yes," he said. "I do. My father taught me."

"Good. What comes after three."

"Four," answers the boy.

"What comes after six?"

"Seven."

"Very good," says the teacher.
"Your dad has done a good job. What comes after ten?"

"A jack," says the kid.