原帖由 prozzy 於 2007-5-18 23:05 發表。  " h7 l. Q% X6 X! O$ U5 L
the answer is -$97 for sure. tvb now,tvbnow,bttvb8 a% z: k- y* X( U# c* A, [* p7 }
Think about it this way
3 ^, p' O* r4 o @/ _" utvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& W8 o# V( K; u" O# N, Itvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ...
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
: Y6 y6 ^- X4 g& T1 Dtvb now,tvbnow,bttvb TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。3 W* w5 |0 m$ r3 c) } ^
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。 W# B- X! ]. z0 @
" A$ E, K! O! |4 R0 c2 F5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |
發表於 2007-7-10 05:18 PM
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發表於 2007-7-11 03:19 PM
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