原帖由 prozzy 於 2007-5-18 23:05 發表。 + O3 [0 r% [, |: J' T9 P5 N
the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。5 W! V$ ^/ t5 v/ E0 _" k
Think about it this way 2 y; {9 J& i" p
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 x9 c( D4 S& Q- q# |! wTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... 6 ]" x9 b+ ~4 `* I- |: C. Z$ g$ jTVBNOW 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。tvb now,tvbnow,bttvb @. Q: }8 Z7 F" f: @
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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
: ~6 @( l: O7 Q) f" j. L& v: G2 n7 v5.39.217.76 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。9 d* R8 {; n e+ |
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.公仔箱論壇) M' F0 y4 Q, i% r Q+ F
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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. |