原帖由 prozzy 於 2007-5-18 23:05 發表。 
2 }7 a: a5 r3 X7 D+ [$ X公仔箱論壇the answer is -$97 for sure.
' V8 L( h; Q8 o& ]TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。Think about it this way
# M. N. H3 Q9 h/ z( `5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
$ H2 M! C& {: ~( j1 l4 |2) Now, the owner discovered that the 100 bucks is fake. You can th ... 3 E, | Y' N' b1 u& Rtvb now,tvbnow,bttvbTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。7 B; A* R5 U5 G
! K0 u! I* f& X0 d公仔箱論壇1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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" ~7 [' S' J. u0 D: U$ Cthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
* D3 _& U4 j: z0 Gtvb now,tvbnow,bttvb
3 i1 ^$ k$ s# b. c% u" x3 q/ hI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |