A sundial has the fewest moving parts of any timepiece. Which has the most?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

I don't get anymore wetter, no matter how much rain falls on me.

John was piloting a plane behind a car but was never able to overtake it. Why?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

During which month do people sleep the least?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What you cannot hold but it is yours?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?