原帖由 prozzy 於 2007-5-18 23:05 發表。 ; O2 g) \3 w# W w, W5 z- d$ i
the answer is -$97 for sure.
2 {; H' _: S( F( n! |tvb now,tvbnow,bttvbThink about it this way
6 E$ H& x6 ]( s% ^1 w/ e2 _5 F5 G1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)tvb now,tvbnow,bttvb; S K; x! a2 N. @+ B7 p
2) Now, the owner discovered that the 100 bucks is fake. You can th ... 2 i: a4 {/ G D; tTVBNOW 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。3 K; z/ l" n, h I
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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
, K0 C* I% n [: t4 p6 c* Y( j5.39.217.76 ) ?, w f. s _! @; \
think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.+ j S- q. i1 a2 W& s0 F- } ^' R
3 `$ X2 i: V: N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. |