What is both possible and impossible at the same time?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

I have some blue and red sock in my drawer. I have a total of 4 socks. I pick 2 socks and the chance that I get a pair of red socks is 1/2.

What is the chance of picking a pair of blue socks?

What is the next number in this series?

4,12,84,3612....

A tourist visits a small town for his research. While in the town, he decides to get a haircut. Since the town is quite small, there are only two barbers in the town � one on the North Street and one on the South Street. The barbershop on the North Street is a mess and the barber has a weird and pathetic haircut. While the barbershop at the South Street is pretty tidy and the barber as well has an impressive haircut.

Which barbershop will the tourist visit for his haircut and why?

You can see it everyday, But cannot touch it at will. What is it?

Solve the rebus riddle in the picture below.

What does this rebus picture identify?

Can you make a six-letter word using the letters N, A and B ?