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The Star puzzle! Anyone solve it ?

  • 09-02-2011 8:48pm
    #1
    sashafierce
    Registered Users Posts: 3,599 ✭✭✭


    This post has been deleted.


Comments

  • #2
    Mr. Presentable
    Closed Accounts Posts: 9,496 ✭✭✭Mr. Presentable


    €20. The €10 the bike cost and the €10 he gave the guy.


  • #3
    rockal
    Registered Users Posts: 757 ✭✭✭rockal


    Mr. Presentable wrote: »
    €20. The €10 the bike cost and the €10 he gave the guy.

    Agreed


  • #4
    mydearwatson
    Registered Users Posts: 88 ✭✭mydearwatson


    sashafierce wrote: »
    This post has been deleted.

    I would've said €30. The €20 that the dealer lost in potential income (i.e. he could have sold it to another customer for that amount), plus the €10 that he gave to the customer.

    What was the correct answer, anyways?


  • #5
    aceygray
    Registered Users Posts: 168 ✭✭aceygray


    It's €40! He lost the €30 he had to give to the shopkeeper, and also the €10 he paid for the bike. So he's down €40 altogether.


  • #6
    Mr. Presentable
    Closed Accounts Posts: 9,496 ✭✭✭Mr. Presentable


    It's €20. The 10 he gave the thief, the 10 he paid for the bike. We can ignore the 30 he gave the shopkeeper because he got it there in the first place


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  • #7
    aceygray
    Registered Users Posts: 168 ✭✭aceygray


    But the €10 he gave to the buyer, he had received from the shopkeeper. So he got €10 from the keeper, then gave it away, so it cancels out. So it's still €40.

    ETA: Nevermind, I was totally wrong, it is €20. I forgot that the shopkeeper actually gave him €30 for the cheque, from which he gave the buyer €10. So he has €20 left, and he has to repay the shopkeeper €30, so he is down €10. Plus the €10 he initially spent on the bike gives €20. Phew!


  • #8
    smallgarden
    Registered Users Posts: 1,604 ✭✭✭smallgarden


    i would have said 30,then 40,then 50
    final answer: 50 as posted above


  • #9
    aceygray
    Registered Users Posts: 168 ✭✭aceygray


    smallgarden wrote: »
    i would have said 30,then 40,then 50
    final answer: 50 as posted above

    But how is it €50?

    Let's say the trader starts off the day with €100. He pays €10 for the bike, so €100 - €10 = €90. He then recieves a cheque from the buyer, which he gives to the shopkeeper, and gets €30 in return. So €90 + €30 = €120. He gives €10 of this to the buyer, which leaves €110. Then he has to repay the seller after the cheque bounces, so €110 - €30 = €80.

    So he started the day with €100, he now has €80, he has lost €20. QED


  • #10
    smallgarden
    Registered Users Posts: 1,604 ✭✭✭smallgarden


    now im torn between 20 and 30
    30 to include opportunity cost as someone mentioned


  • #11
    randombar
    Registered Users Posts: 3,356 ✭✭✭randombar


    aceygray wrote: »
    But how is it €50?

    Let's say the trader starts off the day with €100. He pays €10 for the bike, so €100 - €10 = €90. He then recieves a cheque from the buyer, which he gives to the shopkeeper, and gets €30 in return. So €90 + €30 = €120. He gives €10 of this to the buyer, which leaves €110. Then he has to repay the seller after the cheque bounces, so €110 - €30 = €80.

    So he started the day with €100, he now has €80, he has lost €20. QED

    He didn't actually receive 30, there's no + €30 as it's a cheque. He received nothing.

    He basically gave the guy a tenner, had to give the shop 30 and lost a bike worth 10 so he paid out 50.


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  • #12
    aceygray
    Registered Users Posts: 168 ✭✭aceygray


    He recieved €30 from the shopkeeper, in exchange for the cheque, which he then had to pay back, after giving €10 to the buyer.

    So it's a €20 loss in total.


  • #13
    randombar
    Registered Users Posts: 3,356 ✭✭✭randombar


    My bad, ya the shop gave him 30, which he had to give back, he gave yer man 10 and the bike was worth 10.


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