Ladder

Arivukanru is in Delhi. He is walking on a street, which has clock tower when someone asks him if he wants to buy the clock on the Tower.
Arivukaru says “Yes”.
“Give me a thousand rupees and I’ll go get a ladder”.

The man took the thousand and disappeared. Having waited for several hours the Arivukanru figured he was taken for a ride.
On the next day, the Arivukanru is again walking along the same street and the same man asks him to buy the clock,
“Give me a thousand rupees and I’ll go get a ladder.”
Arivukanru gives him the thousand and says, “I am not a fool. This time, you wait and I’ll go get a ladder.”