Mr. X asked Y to get him two bananas by providing money.  Y bought two bananas and ate one. He gave to X only one. When X asked " Where is the other banana" Y replied " This is the other banana"

The teacher asked the student to point out where Australia is on the world map which was kept hung on the block board. The students replied that he could not find out Australia on the world map. The teacher ordered him to stand up on the bench. The student asked whether Australia would be visible for him if he stood on the bench.  The entire class laughed.