原帖由 prozzy 於 2007-5-18 23:05 發表。 : o" S. V* \, Z4 f; X# v
the answer is -$97 for sure. 5.39.217.76* c6 A# h4 P1 T- g
Think about it this way
* g# H5 ?/ o; S/ h: Z. \3 G; M" G9 I/ ^tvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
2 @$ Z! L# [% ]+ m9 l# G2) Now, the owner discovered that the 100 bucks is fake. You can th ... 9 [% U3 v8 L1 L; jTVBNOW 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。tvb now,tvbnow,bttvb& j# o) _" I# L. f! v, I
tvb now,tvbnow,bttvb, L, H Z: N7 I* H8 M
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
8 y2 b# D0 c1 V! D3 rTVBNOW 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。
7 i3 K- D: N1 ~& cTVBNOW 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。think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。+ }" d- a! V$ ]+ y
+ x" w' N# j1 Y9 {0 {7 PI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |