原帖由 prozzy 於 2007-5-18 23:05 發表。 
" k& O r. v4 B/ I" x) G5.39.217.76the answer is -$97 for sure. TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。$ V' N O( W7 w5 D: O, x1 f! p
Think about it this way 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。$ E% b/ T y9 l$ K A! \
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
! ]0 \) C Z' W# I- a2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb% y( D7 y) l- {% V _& t4 r
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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 wrongtvb now,tvbnow,bttvb ~; H8 J9 G; {1 \3 p, D; E
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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.tvb now,tvbnow,bttvb7 k+ o M, f# U) ~3 f1 d
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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. |