原帖由 prozzy 於 2007-5-18 23:05 發表。 
6 Y. e Q) Q. C6 R/ [4 {the answer is -$97 for sure.
' {& ~8 W0 ^8 ^& a! S" R9 _Think about it this way 5.39.217.76- U: Z' `0 i. v3 Z/ h4 n, j0 \
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: x7 ]9 e2 @1 u S# [: b8 y5 V. [! M2) Now, the owner discovered that the 100 bucks is fake. You can th ... & v; _' _7 K) x1 {2 K2 S. c. M
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1) very good, it the 100 bucks is real, your answer is correct, but it is fake, so your answer is wrong
& D+ w [" j) H* ^- s8 r bTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。
3 V% z: m3 S$ W. O3 e8 Nthink 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.0 r# }8 Q2 z6 t/ `. c7 d" l
- t/ _/ Q0 d3 ^9 s5.39.217.76I know the answer becoz it really happening to my friend in his store in real LIFE, it can not be wrong. |