原帖由 prozzy 於 2007-5-18 23:05 發表。 
0 W% b1 j( r' r, j/ T: ]; h0 q/ @the answer is -$97 for sure. 8 z/ m# @: i6 J! c3 \
Think about it this way 5.39.217.76- L+ q" `5 Q7 [4 _3 [, B$ z6 s
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
8 Z0 ^7 c! l4 E$ a. u9 @/ q2) Now, the owner discovered that the 100 bucks is fake. You can th ... # O2 \* h W" ^$ l0 e9 X+ S
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' b1 \1 y- Y2 Z* U# \7 L; ntvb 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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, u* ?- p+ W, s. G3 ?2 ~ o公仔箱論壇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。0 ~) {! Y% Y' n: y
4 k( z) D9 ?2 F% k5 @" a) I9 nI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |