原帖由 prozzy 於 2007-5-18 23:05 發表。 0 d9 X# V/ W9 U m+ g
the answer is -$97 for sure.
& v' K. X. @7 Y U6 SThink about it this way 公仔箱論壇6 q! z8 ]% x, M. P0 {& M
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
& L: l g0 l3 c( ^( L公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... ) j' u/ M+ ?( ^ |4 K+ ?% V6 O
. i, M; Q0 y9 \4 Z9 p1 dTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 5.39.217.76( j* D Q$ _3 @3 a N/ c" |1 D
1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong5.39.217.765 w9 I% E; `7 v) F# J# q% q
: |" \, Y" [! O公仔箱論壇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 y/ T/ T% @2 O0 h5 t9 D7 y& S+ {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. |