原帖由 prozzy 於 2007-5-18 23:05 發表。 5.39.217.763 _) A" s* B, Q4 b0 H; v
the answer is -$97 for sure. 4 s# h. O8 v+ s. U% J$ Z
Think about it this way . U' G6 b9 _* X5 ~8 ]
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
% A- T5 B8 D9 n% L5 v2 qTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2) Now, the owner discovered that the 100 bucks is fake. You can th ... ; E3 i- F6 z$ D5 Y" `1 d5.39.217.76# A, R. P% e" T' `4 ~
& J- I9 m+ x. c9 F5.39.217.761) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
% O3 E0 Q7 r# oTVBNOW 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。
0 f: V- f! T* R7 a. | Kthink about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.76; R5 f* c+ S6 s7 r8 Q: U. p2 n L
2 T: u( I4 H$ Y( c# R6 y- nI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |