原帖由 prozzy 於 2007-5-18 23:05 發表。 
- ]* U( ^7 A/ {& S# H5.39.217.76the answer is -$97 for sure. 5.39.217.764 x# x- I1 x9 t3 b
Think about it this way
) x n# F9 q/ v3 l# N5 w2 A7 g公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
6 V. o+ Z9 h7 v5 Y% {* I' atvb now,tvbnow,bttvb2) Now, the owner discovered that the 100 bucks is fake. You can th ... 0 i7 P5 _- j( ?9 h0 Q+ P' y
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。2 `1 }! F, @( s
2 E% a3 \" Q% D5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.76/ \5 Q9 G# f1 f1 C5 E
# |* z+ ~2 T; P4 y6 C5 Gthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
+ M! g) z) V. u+ B* x 5.39.217.76; e, x: @$ Q3 K* h* E
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |