A seller has some quantity of rice with him. The seller offered his customer that if he/she buys half of the rice he has, he will give half kg of rice as a discount. The first customer accepts his offer and he purchased half of the rice and get half kg as extra. After selling the rice to the first customer he again makes the same offer for the second customer, and so on. The seller left with no quantity of rice after he made the fifth transaction.

**Q. The initial quantity of rice the seller had?**

**Answer: **31Kg

**Explanation: **

Let us calculate the total kg of rice which seller has before each customer came for purchasing.

- Before fifth customer: (1/2 kg as a discount)*2 = 1

So before dealing with fifth customer seller should have**1kg**. - Before fourth customer: (1+(1/2 as a discount))*2 = 3

So before dealing with fourth customer seller should have**3kg**. - Before third customer: (3+(1/2 kg as a discount))*2 = 7

So before dealing with third customer seller should have**7 kg**. - Before second customer: (7+(1/2 as a discount))*2 = 15

So before dealing with second customer seller should have**15 kg**. - Before First customer: (15+(1/2 kg as a discount))*2 = 31

So before dealing with first customer seller should have**31 kg**.

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