原帖由 prozzy 於 2007-5-18 23:05 發表。 
* r; F4 r: C3 P: s+ O9 F" M' L公仔箱論壇the answer is -$97 for sure. 6 l0 ~& c7 R/ g- q0 m* K
Think about it this way
0 E' H9 f0 C" p/ w4 M w% w) o- DTVBNOW 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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇( l- V. H6 v* P
2) Now, the owner discovered that the 100 bucks is fake. You can th ... + l3 e" d& e# f. I( V2 tTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
/ X" t/ F& D$ B2 x2 X* l4 S6 l8 V5.39.217.76 # y; z& ^2 g# m1 W/ d% u0 ?4 b
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongTVBNOW 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。# N2 ^7 [6 }" J
! Y0 y2 S8 t$ t$ p% ~- c$ R7 B: Vthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.764 Z, F( z: ^$ a3 P
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。4 S2 S4 P1 e7 y4 s4 l& d
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |