What work can one never finish?

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

Do you know what I am?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?

I look at you, you look at me I raise my right, you raise your left. What am I?

What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

I am a five-letter word under you,
Remove the first letter and I am above you,
Remove the second as well and I am around you.

Who am I?

The ages of a father and son add up to 66.
The father's age is the son's age reversed.
How old could they be?
(3 possible solutions).