Total kitni billiyan hai?

Masterji: Agar main tumhein 2 billi doon, phir 2 billi doon aur phir 2 billi doon, toh tumhare paas kitni billiyan ho jaayengi?

Pappu: 7.

Masterji: Nahin, dhyaan se suno. Agar main tumhein 2 billi doon, phir 2 billi doon aur phir 2 billi doon, toh total kitni billiyan?

Pappu: Masterji… 7.

Masterji: Achha, alag tarike se samjhaata hoon. Agar main tumhein 2 seb doon, phir 2 seb doon aur phir 2 seb doon, toh kitne seb ho jaayenge?

Pappu: Ji… 6.

Masterji (khush hote hue): Shabaash! Ab batao, agar main tumhein 2 billi doon, phir 2 billi doon aur phir 2 billi doon, toh kitni billiyan ho jaayengi?

Pappu: Kitni baar boloon… 7.

Masterji (gusse mein): Arre nalayak! Jab seb 6 ho rahe hain toh billiyan 7 kaise?

Pappu (rote hue): Kyunki Masterji… mere ghar pe pehle se hi ek billi hai!