原帖由 prozzy 於 2007-5-18 23:05 發表。 
$ M/ O) O( G+ v: V4 A) _7 Q5.39.217.76the answer is -$97 for sure. 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。0 \) Q4 W1 k7 `! G9 v& ?7 W
Think about it this way
4 {1 T8 s9 H. P; Ptvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb; u5 H5 Y! G. K* p
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb: A; R1 R* v: x
/ U8 @9 G# Q2 O) d" V( UTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 tvb now,tvbnow,bttvb5 I, l. K- }8 y5 h* G0 w/ @ Z
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong! s; ~$ z: ~: W4 C1 y0 B
& K+ L. ^" c6 @" _think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
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$ H7 c( ]/ A. q$ K( Q+ VI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |