What does this rebus means ?

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

A father's child, a mother's child, yet no one's son.

Who am I?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?