原帖由 prozzy 於 2007-5-18 23:05 發表。 
# B$ I+ l O8 f公仔箱論壇the answer is -$97 for sure.
0 g( A y- [1 vtvb now,tvbnow,bttvbThink about it this way 5.39.217.763 j- ]( [) l" T/ Q/ M d
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)8 [, q& {% P% H/ [( x
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb1 E( x" J7 y1 l. d* h* u& _
. H' ~) e: ^1 r5 ^5.39.217.76 5.39.217.76+ ^4 ~" i( y9 Q: ?4 I
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong# @! h# l, l* U5 N
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。. f7 ~7 S: N! @ s
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.
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$ w: B! x' F8 ztvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |