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Trick Teaser Ias Interview Question

Trick Teaser Ias Interview Question - 29 July

A Sweet girl purchased a book from a bookkeeper and give him Rs. 100.
The cost of book is Rs.30 but the bookkeeper had got no change, so he get the change from next shop and return the girl her 70 Rupees.

After some time time the next shopkeeper comes with the 100Rs note and told the bookkeeper that the note is fraud, so he takes money back.

How much loss did the bookkeeper face ?

For Solution : Click Here

81 comments:

  1. Replies
    1. 170 is the right ans... as the shopkeeper goes to another and take 100 as change, then change Rs. 70 he returns to that girl and keep Rs. 30 of book... again returned the Rs. 100 to another shopkeeper... so this 100 and the Rs. 70 given to that girl.. is equals to Rs. 170.. and mow you are thinking of book price but he already cut it from that 100 from another shopkeeper...

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    2. Nope, the answer is 100... the shopkeeper returns the 30 to the another shop keeper which is bought from him. so the loss is 70 given to tht girl and the cost of the book 70. Total 100

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    3. answer is 100 because the other shopkeeper asked 100 rupees to shopkeeper one in which he takes from his pocket .the product he sell to that girl is again with him as 30 rupees

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  2. Replies
    1. its 200RS
      (since; he lost his 100RS+a book+the change 70RS he had given to the girl)

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    2. what about 100 rs he has taken from the second shopkeeper as change.... ans is ----- 70+ cost price of book.

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  3. Rs.200/-(Rs.30 for book + Rs.70 that given to the girl + Rs.100 that given to the shopeeoer)

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    1. Ya I agree with you. It is correct as per my calculations that the shop keeper have got loss of book worth Rs. 30/-, paid 70/- back to the girl and when it was fake, the shop keeper paid back to the person Rs. 100/-.

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  4. Rs.70/- + the cost of his book.

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  5. This comment has been removed by the author.

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  6. This comment has been removed by the author.

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  7. Rs.200/-..(Rs.70 as a balance)+(Rs.30 cost of)+(Rs.100 duplicate note)..finally total is Rs.200

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  8. Rs. 200
    (30 book + 70 change to girl and Rs. 100 to the shopkeeper)

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  9. Replies
    1. Wrong ... Its 100....

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  10. only Rs.100 the book money is included in this 100 rupees itself

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  11. 100 the bookkeeper received change for the 100 from the shopkeeper.

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  12. 130......100 to shopkeeper ani rs. 30 of book.....and that rs.70 is taken from the shopkeeper and gave to that girl ...so ans is 130

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  13. Rs.200/- (Book cost plus the amount exchanged to the next shopkeeper and the balance amount given to the girl)

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  14. Hi Admin,

    could you explain why the answer is 100, not 130(100+book cost)?

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  15. next shopkeeper takes 100 rs back+he gave the book of value 30 rs+he gave 70 rs as change=rs 200

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  16. 170(30 for book+70 returned to girl+70 he returned to shop keeper bcoz he had alreadt taken 30 /- for the book)

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  17. No loss - For the question said "sweet girl"... so the note is not fraud! :) The other shopkeeper is a Dbag... just did not wanted the change back.

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  18. Think it this way.The other shopkeeper didn't lose any money.The girl gained 100,so the bookkeeper lost 100 in total.

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  19. girl gained 70 rs

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    Replies
    1. 70(change) + 30(notebook)

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  20. This comment has been removed by the author.

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  21. it should be 200 or 170 ( including or excluding book cost )

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  22. 100+ 30= 130
    100 Fraud loss
    30 cost loss of the book which he incurred

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  23. got faulty 100 from girls........
    return 70 with a book cost 30
    means if cost price of book for shopkeeper will be 30 rs then he faced 60 rs loss on the book
    and he also has to return the money 100 to other shopkeeper
    so total loss will be(70+60+100)=230

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    Replies
    1. LOL.. Stupid

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    2. haha... he really is...

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    3. no he is correct !

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  24. 100 rs is total loss.
    Bookkeeper had to RETURN money to shopkeeper which he took in exchange of fraud note .!

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  25. Think what were the transactions that happened from shop keepers stand point. S/he gave away book worth Rs. 30 and Rs 70 in good notes. Rs 100 was given to the other shop keeper. He has Rs 100 fake note which has no value, with him. So totally he lost Rs 200.

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  26. The answer is 100 RS. The profit made by the girl should be equal to the loss incurred by the shopkeeper. The girl made the profit of 100 rs coz 30 rs worth book and valid 70 rs :)

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  27. The answer must be 100 Rs.
    We can think it in this way that the girl (here denoted by :G) first arrived at the shopkeeper(here denoted by : S) which had change.
    Now out of that he paid the bookkeeper (here denoted by :B) Rs.30 and finally the (S) comes to (B) to take his money back.

    Now the whole thing goes like this.
    S gave 100 rs to G and G gave 30 rs. to B
    B sold the book worth rs. 30(considering full profit)
    S arrived to B and demands for genuine 100 rs.
    B along with that 30 rs. income add 70 rs. by his own and give 100 rs. to the S.Thus B looses a book of rs. 30 and also looses rs. 70 which he paid on by his own.

    Also in the whole transaction the S neither encounters a loss nor any profit. Therefore since the girl earns(earning means having profit) rs. 70 and a book of rs. 30 i.e. totally earns rs. 100 ,therefore, the shop keeper must have also lost rs. 100..(This is analogous to physics mechanics problems where in the absence of any external agent total mechanical energy remains conserved, analogously if we consider the B and G as the system net profit (or loss) on the system must be zero)......

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  28. Its hundered. the lady made a profit of 100 = loss of shopkeeper

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  29. PARSURAM BALIARSINGHDecember 18, 2013 at 2:57 PM

    ANSWER- RS 200(100+70+30)

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  30. it is 130rs
    loss for shop keeper will 30rs for book and 100rs that he paid for next shop keeper. (70rs that he paid for girl is given by next shop keeper .. for whom he will give 100rs)

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  31. Loss of bookkeeper will be 100 rupee. 70 + 30 = 100 70- when he returned 70 to girl 30- book cost

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  32. Rs 200 is a stupid answer. He recvd 100 (fake from the girl), gave to other shop keeper and recvd 100 change. Now the loss calculation begins. He kept 30 and gave the girl 70. So when the other shop keeper returns fake 100, he has to give back the 30, then add 70 which the girl took away to pay back the other guy. He can throw that fake in the bin. If I count the cash at the end of day, it will 70 short. If I count the money in book inventory (at full retail) 30 will be short. So the answer is 100.

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  33. These guys answering more than 100 should not be IAS aspirant. otherwise their will be unlimited corruption

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    1. a single wrong ans. Doesn't decide ur complete ability........be careful for ur selection of words......otherwise u hv to suffer once in life.....nd m sure that u'll never be an ias or ips. However m only 16, but i can tell u all these things........and afterall failure is the pillar to sucess...so, u please leave thinking for corruption mr. Xyz

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  34. Instead of seeing hw much shopkeeper lost see see how much girl and the other person gained.
    girl= book(30 rs)+ 70 rupee total =100
    other shop man=0 no gain no loss.
    so the shopkeeper lost 100 in total.

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  35. 170 is d answer, first he gave the girl book + 70rs(100 rs), kept 30rs, later hegave shopkeeper 100, so book+ 70+ 100 -30= 170 rs

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  36. Dont consider the 100rs note.
    For the time being, jst believe the bookkeeper borrowed 100rs out of which he gave 70 to the girl and kept 30 wid himself. Now when he has to return that 100 he already has 30 wid him nd he has to manage other 70 which then makes a total of 100. So we conclude that he sufrd a loss of 70rs nd a book which costs 30. So net loss is 100

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  37. 100 is the right answer.

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  38. answer is 200/-
    the bookkeeper give a 30/- book to the girl and 70/- which he borrowed from the next bookkeeper..so till now the loss is 100/- .Now for the fraud 100/- note the bookkeeper had to give a real note of 100/- to the next shopkeeper..
    so the net loss is due to the 30/- book ,70/- real change and 100/- which he had to give the next bookkeeper is 200/-

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  39. Guys answer is Rs. 100..
    Question is loss suffered by the book keeper... The book keeper exchanges Rs. 100 (legal currency) against Rs. 100 (fraud currency). He gives Rs. 70 (legal currency) to the girl. After that he will be left Rs. 30 (legal currency) which was the cost of the book. So till now he had made no losses (irrespective of what girl gained). The question of suffering loss by the book keeper arises when the shopkeeper gets back Rs. 100 (legal currency) against Rs. 100 (fraud currency) from the book keeper. So the actual loss is of Rs. 100 paid by the book keeper to the shop keeper. (please don't add cost of the book as the book keeper has Rs. 30 (legal currency) in exchange for the book)

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  40. Guys.. the answer must be 200
    The girl gave a fraud note... but got Rs.70 along with the book that costs Rs.30. Rs.100 is the bookkeeper's first loss. Later the shopkeeper inturn took his money back in place of the fraud note from the bookkeeper. . This is bookkeeper's second loss.
    Finally he lost an amount of Rs.200

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  41. what kind of logic is this? in first transaction, he collectes the fake note and by giving that note to other shop and gets the change, keeps the price of the book Rs. 30 and gives book and 70 to the girl. he looses nothing. he looses Rs100 when the other one returns the fake note. in short all transactions are genuine except the fake note. the maximum loss will be the face value of the fake note.ie.Rs.100

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  42. It cant be 170 because he gavr rs 100 note thats y shopkeeper gave change

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