The Star puzzle! Anyone solve it ?

sashafierce

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Mr. Presentable

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

rockal

Mr. Presentable wrote: »

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

Agreed

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?

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.

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

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!

smallgarden

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

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

smallgarden

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

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.

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.

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.