原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb4 |% v1 F7 ~; x
the answer is -$97 for sure.
2 z, }6 p* d! _( p/ b* @Think about it this way 3 u6 V. j7 v8 L: I
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 r. u* p) o' ]5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... ) i0 c. u8 I! G3 n1 }- k- c$ @# y; X r
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. E/ K g5 m; h9 O2 n6 y 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
+ [1 k! ^6 ?5 b v' q/ V7 Etvb now,tvbnow,bttvb
, d/ ^, U$ D d# aTVBNOW 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, 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.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。4 |9 I d/ |0 ?" y" u! b9 z6 Y
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |