Seven

Teacher: If I gave you 2 rabbits, and another 2 rabbits and another 2, how many will you have? Pappu: Seven Sir. Teacher: No, listen carefully. If I gave you 2 rabbits, and another 2rabbits and another 2, how many will you have? Pappu: Seven. Teacher: Let me put it to you differently. If I gave you 2 apples, and another apples and another 2, how many will you have? Pappu: Six. Teacher: Good. Now if I gave you 2 rabbits, and another 2 rabbits and another 2, how many will you have? Pappu: Seven! Teacher: Where do you get seven from? Pappu: Because I've already got one at home.