Answer:
What goes up and never comes down?
What goes up the hill and down the hill, And spite of all, yet stand still?
Twelve pears hanging high, twelve men passing by. Each took a pear and left eleven hanging there. How can this be?
Dora died at a very old age on her 24th birthday. How can this be?
What is the largest $ amount of change you can have in your pocket without having exact change for $1?
If all Wibbles are Criggles, all Borkins are Kwumblins, no Hoggles are Borkins, and all Criggles are Borkins, is it true that all Borkins are Criggles?