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Solve this riddle if u dare c:

deletedover 8 years

This riddle became so popular in my country later so I'm gonna tell u it and let u try to solve it xD Here we go

A money thief had a fake 100 $ he went to a shop and bought from it's owner a newsletter that costs 10$ as he gave the fake 100$ to the shop owner the shop owner didn't have 90$ he had only solid money so he went to a cafe and gave it's owner the fake 100$ solid and took ten 10$(which means 10 x 10 = 100 x3 ) then the shop owner gave the thief the rest of his money which are 90 $ then after a while the cafe owner came to shop owner and told that 100$ he gave to him is fake so the shop owner gave him another 100$

How much did the shop owner lose?

(I shall answer it after a while xD) if you are confused write in the comments and I will answer (i'm not that good at writing in meaning xD)

deletedover 8 years
firesheep you're wrong he took fake100$ from thief and gave him a newsletter that costs 10 $ and gave him the rest of his money which is 90 $(not fake) and he took 10$ for himself(remember that he went to the cafe owner and traded)
deletedover 8 years
Theres no context to find opportunity cost. Itd be his hours away from work
deletedover 8 years
i didn't concentrate really on punct nor grammar
deletedover 8 years

Spoiler
If the fake = 0 then. The shop owner has 0, he gets $100 from the cafe. Gives the thief $10. The shop owner now has $90. The cafe wants back the $100. The shop owner gives back the $90 + $10 which = $100.

So, if I'm correct the shop owner lost $20. Newsletter = $10 and the $10 for the $100.
alkair
over 8 years
@EtherealFan gotta take into account the opportunity cost ;)
deletedover 8 years
Shop owner lost $90

And a newsletter (costing $~1)
Escurai
over 8 years
Is it a riddle because of the lack of punctuation makes it so hard to understand?
alkair
over 8 years
lost 100 coz the newspaper is worth 10