1. The teacher asked pupils what the shape of Earth was.
Tom answered that it was round.
The theacher asked how he knew it was round.
Tom said that it was square; he didn't want to argue.
2. The teacher asked why student was always late for classes.
Student answered that it wasn't his fault. The bell always rang before he got at school.
3. The teacher asked what the difference between lightning and electricity is.
Schoolgirl answered that people didn't have to pay for lighting.