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Shopkeeper and duplicate note puzzle on profit and loss

5 replies [Last post]
sanjeev's picture
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Joined: 21 Feb 2011
A very simple but confusing puzzle on profit and loss.
A lady buys goods worth Rs.200 from a shop. (shopkeeper is selling the goods with zero profit). The lady gives him Rs.1000 note. The shopkeeper gets the change from the next shop and keeps Rs.200 for himself and returns Rs.800 to the lady. Later the shopkeeper of the next shop comes with the Rs.1000 note saying “duplicate” and takes his money back.

How much LOSS did the shopkeeper face?
a. 200
b. 1200
c. 1800
d. 1000
e. 2000
f. none of them

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Joined: 25 Dec 2013
Shopkeeper and duplicate note puzzle on profit and loss
Why it can not be 1200? As shopkeeper should return 1000 to next shopkeeper and lost goods worth 200, so total loss is: 1000+200.
sanjeev's picture
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Joined: 21 Feb 2011
1200 can't be answer Srikanth
I would write the solution after a day or two, so that other users will have time to solve it.
Its bit easy but bit confusing, thats'y I posted here.

Hint: Think you are a shopkeeper and you have no money in your pocket except that goods of worth 200 INR and then try to solve it.

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Joined: 25 Dec 2013
Yes, answer is 1000 :P
Now understood, how answer is 1000.. :) Once the next Shopkeeper comes with 1000 Fake note, shopkeeper 1 gives 800 of his own money (which is a loss for him) and also he lost the goods worth 200 INR.. So total loss is: Rs.1000 (800+200)..
sanjeev's picture
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Joined: 21 Feb 2011
Right explanation Srikanth 1000 is correct answer
Right explanation Srikanth 1000 is correct answer :)
Try other puzzles too :)

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sanjeev's picture
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Joined: 21 Feb 2011
Solution to the puzzle: 1000 is the right answer
this is about total gain/loss for all parties involved.
The woman gains 200 from the goods, and 800 from the change. There is no gain or loss for the neighbour as what he gave to shopkeeper took back.
Since its a zero sum game, lady gained 1000 rupees, so someone has to lose it ;).
So, It implements that the shopkeeper loses 1000.

Seems easy answer but, was not that confusing question? :P

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