Number 1 : M.r A is going with an old-human to see M.r B. M.r B said : Who is that ?. M.r A said : My wife' s father has one brother and one sister and this old-human' s husband-sister is my wife' s aunt. Who is that ?
Number 2 : Two people are playing a game with ten marbles. Each time, one people can take 1 -> 3 marbles. If you the player and you play first, what do you play then you win ?
Number 3 : A man is going with a woman. A human see them and said : Hello, two couple. Have a nice day! The man said : No, we aren' t couple. But her great-grandmother is my great-grandmother, too. What correlated from the man to the woman ?