原帖由 prozzy 於 2007-5-18 23:05 發表。 
1 g5 R+ b" p) x. t& S1 n+ Q$ M5.39.217.76the answer is -$97 for sure.
, S4 G8 @9 `! u, `8 [Think about it this way tvb now,tvbnow,bttvb# ^# r; d4 L( E2 {0 C3 H
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& _' J$ M3 `- P, W8 f6 v) `2) Now, the owner discovered that the 100 bucks is fake. You can th ... 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。+ A) n8 {0 I8 R+ ~8 @8 A8 V
+ V8 ^' W) }3 F2 K# T5.39.217.76
/ V3 d1 }4 b! w* x; z, h6 R1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong C. \0 Q& V+ g' Z
5 b' Y5 X- A- Q+ g- dtvb now,tvbnow,bttvbthink 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,bttvb2 n9 ]( B4 M2 \* e: U9 O8 R
8 Q3 u8 Y/ \& @& T) T2 UI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |