原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇; [8 L. K. p' F
the answer is -$97 for sure.
, }. F6 Q, _" t4 P7 P1 Q; x4 m6 ^Think about it this way
7 a7 L7 Q4 I8 z* C! U2 ]5.39.217.761) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
{( y5 x) t, ?! V) t公仔箱論壇2) Now, the owner discovered that the 100 bucks is fake. You can th ... 公仔箱論壇8 [) X/ [6 i, U8 @/ C
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5 L6 J& G3 U( T( W4 Y1 G& mTVBNOW 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) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
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* q) a" A3 T* m5.39.217.76think 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.公仔箱論壇1 R" t5 `: [" S. L1 G
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I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |