原帖由 prozzy 於 2007-5-18 23:05 發表。 
B" U& \( a2 }% u; l( gthe answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。) Q$ _5 f. R( r2 n
Think about it this way
- I( I2 {9 \$ \1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
; u, |. A8 i( r! d公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇5 H* w- ?& y: D b* _
7 K9 ^' e% j2 y0 ?% q) w# ~9 QTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
" ^# B$ n% l1 s1 E7 f J% ftvb now,tvbnow,bttvb1) 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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/ C) }7 m6 k' x* @3 N% ~; Q5.39.217.76think 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.
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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. |