原帖由 prozzy 於 2007-5-18 23:05 發表。 tvb now,tvbnow,bttvb9 [. U# _1 l' \+ I
the answer is -$97 for sure.
0 f9 N7 H5 p9 d& }! G* c# mtvb now,tvbnow,bttvbThink about it this way 5.39.217.768 _$ K8 F6 g. o) Z. w
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
0 m' _2 ^% z+ Z; y6 `4 z5.39.217.762) Now, the owner discovered that the 100 bucks is fake. You can th ... 5.39.217.76 I ^' G/ D+ y1 G% c4 |
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8 B! h& |: c/ zTVBNOW 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 wrong7 A- s# O( B0 k3 t9 m1 Z7 ]9 ] G
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。) t1 d# g( Q& U' D
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.5.39.217.76+ ?. C7 l# ]& P* @6 [1 O8 J2 m
4 a7 X3 K# g. A H8 z, U y, Itvb now,tvbnow,bttvbI know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |