Answer:
A man is able to contact his long lost brother who has never met. They agree to meet. When the brother arrives he is able to instantly pick him out from the crowd. How is that possible?
The yellow house has yellow window, the red house has red windows, what colour windows does the green house have?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
A man is twenty years old but has only had five birthdays. How is that possible?
If you have 30 white socks, 22 black socks, and 14 blue socks scattered across the floor in the dark, how many would you have to grab to get a matching pair?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around