原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb+ k& X# Z. _" o2 s' g* ?
the answer is -$97 for sure.
+ S- Y9 P; D+ F4 m9 u D. zThink about it this way tvboxnow.com* d, l* u& q8 e) M
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 ~8 O1 Y% Q/ F
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ( H# d& e6 E! o0 B/ j7 u: t# D
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! k6 H) s$ O9 m( @7 Dtvb now,tvbnow,bttvb1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong( R5 o( A2 M! m4 Q1 q
tvboxnow.com) K* x6 C3 j+ C8 s& G
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.1 v9 h% r# h& L/ \, H
tvb now,tvbnow,bttvb4 a% J3 g* o4 F: U; ~$ H0 \
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |