原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb n9 |& }2 S5 q& _, _
the answer is -$97 for sure. tvb now,tvbnow,bttvb3 f8 \8 o& o& I# \ [" ]8 t1 Q
Think about it this way
( u" q' V0 O8 {4 E2 E! s1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
$ |" M: Q& K8 n. ]7 H- Jtvb now,tvbnow,bttvb2) 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。 b- z6 i/ u/ _) c( P1 L9 r
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5 Q; u! Y" ?7 G公仔箱論壇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。1 L' Y( {9 \4 s( B, K; J7 B$ f
5.39.217.76( C5 y8 p: Z$ T1 e
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.76$ ~, p; B, _; S% n0 w8 z
( X9 y/ ^+ ^6 x8 O7 e, Q" JI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |