原帖由 prozzy 於 2007-5-18 23:05 發表。 公仔箱論壇8 f# W0 x# o+ z0 l+ _ t
the answer is -$97 for sure. 公仔箱論壇# ]9 f) p! q: s
Think about it this way 公仔箱論壇8 x# N7 G" T% M) z+ F
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.77:8898) C0 {% K# U1 x2 c0 N
2) Now, the owner discovered that the 100 bucks is fake. You can th ... tvb now,tvbnow,bttvb" {) J: s8 S) S5 ^6 ^
公仔箱論壇+ l% w2 |: e; r5 \7 g) J u3 D; S
[4 B/ |4 K0 g! ~% w( @. {- UTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong% `. I I) r0 N4 P; r
2 U1 H P; ? Q$ G5.39.217.77:8898think about it, when the bill is fake, and he gave him $79 change back, that is -79 already, it means the 100 on his hand is equal to 0 (Zero), how did he makes profit when he got a fake bills, then he need to pay another real 100 dollars bill to his neighbor, that another -100, plus the product he lost, thats another 18 dollars, Do Not Even Mention the 3 dollars, there is no profit he can make when he got a fake bill.5.39.217.77:8898. b; _$ K4 r/ Y
! O% M3 K' E2 R8 ^6 ltvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |