原帖由 prozzy 於 2007-5-18 23:05 發表。 
, t2 w$ L. g( ?the answer is -$97 for sure. : Y5 }* {' E/ e9 Y1 G6 [+ }
Think about it this way
3 V1 R% g: _' O0 t: J/ h1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)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。3 D8 ~# r2 j' L
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb" p" n% G* M4 L4 `' _; o
公仔箱論壇0 ?' e( l& x: N7 D% J' y
公仔箱論壇6 J* ]; Q2 l, }! B5 Y
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
2 p t6 E8 [; _! d% x 公仔箱論壇% j; l0 `3 N4 b; u& u) T, ^7 h
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.
1 i+ U- l6 [2 `" _5.39.217.76 6 \% ~+ b0 B& D x& Y
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |