原帖由 prozzy 於 2007-5-18 23:05 發表。 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。" r( Q! B. G2 I7 z9 f/ Z
the answer is -$97 for sure. tvb now,tvbnow,bttvb( n s d+ l F
Think about it this way
7 g. d- N5 ~9 x( e! D# L; {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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
. s% }+ F2 m G- B- u2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb3 G- O' p9 l7 _% @9 m7 g
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TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 }8 I( k- C+ x
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrongtvb now,tvbnow,bttvb9 \+ p$ u: |4 b
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think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.77$ q- p) H% ~: | I' O+ ^
6 q0 T4 y& r4 S) z2 qI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |