What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

I add 5 to 9 and get 2. The answer is correct, so what am I?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Replace the question mark with the correct number.