原帖由 prozzy 於 2007-5-18 23:05 發表。 
# @: k, ~$ Y) Z. r- Y5.39.217.76the answer is -$97 for sure.
" q7 q# U1 L# i6 v6 n* MThink about it this way
6 r0 x; T. ?, Z1 J6 v' L公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。% o: Z$ \# Y1 V/ F
2) Now, the owner discovered that the 100 bucks is fake. You can th ... ' j% ?% [" d( f7 f/ b+ |
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
5 f# ]) A' o5 }7 j# \; \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。
* P3 ? R; i: g- V- }tvb now,tvbnow,bttvbthink 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.
8 r) a! T) r* X( ]' s' Q公仔箱論壇 5.39.217.761 H& t8 y1 S2 Y# ?
I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |