Spot what is wrong here in below Picture?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

Name a key which is hardest to turn.

You need to move three matchsticks to form three squares. Can you do it?

No matter how little or how much you use me, you change me every month. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What number divided by 4 is the same as that number minus 4?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?