One day a rich man met Sam. The rich man asked,?I hear you are very clever and nothing is difficult for you. Can you tell me why you are so clever? Sam answered with a smile,“ Oh, I’m not clever. But you are too silly.”The rich man became very angry. Sam said, “Master, please don’t be angry. If you don′t believe what I said, now let me ask you a question, If you have a group of sheep, I sent you another group. Then, how many groups of sheep do you have?” ,Alas! That′s the easiest question in the world. One plus one is two. Anybody knows that. I have two groups of sheep.? Sam laughed and said, “You are wrong, Master. Two groups of sheep put together is still one group. That’s the easiest question in the world.”