1. $10, $20, or $30? 十元，廿元，還是卅元？
Painter John finished an art work and asking for sale. Peter bought it with $100. But then, changed his mind and returned it back to John for $80. John, then, sold it to Ken for $90. How much did John earn?
John's point is that $100 would be paid off the expenses of art tools, time and etc. He bought it back at $80 and sold it for $90. He earned $10. Peter thought that when John sold it for $100, he earned $20. Then, the second time sold for $90, he earned $10. Then, John earned a total of $30. Ken thought that a $90 art work sold for $100, which John earned $10. Then, he got it at $80, sold it for $90, he earned another $10. John earned the total of $20. Did John earn $10, $20 or $30?
畫家甲畫了一副心血結晶的作品，標價求售。乙以一百元買下來，過後，乙改變主意，返回去以八十元退回給畫家甲；甲轉頭卻以九十元賣了給丙。問畫家甲到底賺了多少？
甲的觀點是：一百元是成本，正好扣除了所付出的畫具及時間，八十元買回來後，以九十元賣出，是賺了十元；乙認為是：起先一百元賣出、八十元買入時賺了二十元，再以九十元成交時賺了十元，前後一共三十元；丙卻想：九十元價值的畫以一百元賣出，起先是賺了十元，再以八十元買入、九十元賣出，賺多十元，一共二十元。究竟甲賺了的是十元，廿元，還是卅元？
2. All men are beasts, 男人都是野獸
Assume a=c and b=c, therefore a=b. 因為a=c及b=c，所以a=b
now let a is men, b is beasts and c is animals. 現假設a是男人、b是野獸及c是動物
men=animals and beasts=animals, therefore men are beasts.
男人=動物 及 野獸=動物 所以 男人都是野獸了。
3. All men are interesting, 世上沒有沒趣的人
Lets assume men on this planet divide into two groups. One group with interesting people and the rest are considered uninteresting (or boring). There is a rule according to the logic: within the uninteresting group, the most uninteresting person will becomes interesting since people are so curious on why he is so boring, what he did daily and etc. In this case, the second most uninteresting person will become the most uninteresting, then again, move to the interesting group. On and on, people in this world will be all interesting.
假設世上分成兩種人，一種是有趣的人，另一種是沒趣的人，然而在羅輯上有一個條件，就是沒趣的人群裡最沒趣的一個人，會因每人都好奇為何他那末沒趣而成為有趣的人，而原是第二沒趣的會成為最沒趣，再進而成為有趣；如是者，世上不會有沒趣的人了。
4. 4 Kids 四個小孩
John's cat gave birth 4 kitties. His friends asked him what are the kitties' genders. John doesn't know but took a guess. The ratio of the male and female can only be 4:0, 3:1 or 2:2. John guesses 2:2 since the probability of each gender is 50%, therefore the overall gender ratio would be 2:2. What do you think?
甲的貓生了四隻小貓，友人問起小貓們的性別，甲不知道，但估計男女的比例是2比2（註：比例只有4比0、3比1及2比2），原因生男或生女的機率是百分之五十，所以比例理論上是2比2的機會較大。你說對不對？
Wilson
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wilson@wchu.com
chufamily@mindspring.com
cwchu@scils.rutgers.edu
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