原帖由 prozzy 於 2007-5-18 23:05 發表。 8 A/ u, n; N8 j5 q4 i( g- u
the answer is -$97 for sure. ) B5 `) Z; Y0 h! R2 b- J0 \
Think about it this way tvb now,tvbnow,bttvb4 L* Z3 |. T$ F5 B$ A0 e& E
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb* e1 ]5 V( Z! K% N
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇, K. u! G% I6 K: ^$ d) b. A& n
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5 C3 {( _# U. O0 \- J0 Q; vTVBNOW 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) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong+ y d" Y0 b) ?+ r: C4 n
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
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$ t8 r2 n S1 b z0 s( L5 Z) ~公仔箱論壇I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |