原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.76, Y( g4 j1 F1 A/ q
the answer is -$97 for sure. 公仔箱論壇. V/ R A: z$ g2 w8 S l2 W
Think about it this way ( c; r9 ?, D' X- J6 D, W( d
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb- X7 u, y |; V
2) Now, the owner discovered that the 100 bucks is fake. You can th ... TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。0 Y0 v5 `; C5 }+ [& D7 M# `
, v3 b$ y# U- D/ a- ]! l! n5.39.217.76
4 `! q, g8 K/ ~) y ]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。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong公仔箱論壇0 B; i6 H/ ] E4 Q# }
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。3 M/ r" x1 `0 e+ ~7 I7 ?* G" e4 V R
think 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.
3 y7 H# _8 }! a7 }+ Y8 YTVBNOW 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。
, X+ u! @* O& B E5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |