Answer:
There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?
A young woman is attending her mother's funeral. While there, she meets a man she has never seen before and falls in love immediately. After the funeral she tries to find him but cannot. Several days later she kills her sister. Why?
A bike rider is traveling north at 25 mph, a car passes the bike rider going north at 40 mph. At the same time the bike rider passes a jogger running north at 5 mph. Which will move away from the bike rider at a faster pace, the car or the jogger?
What goes up the hill and down the hill, And spite of all, yet stand still?
How far can a man hike into the forest?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around