Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

How many triangles are there on the puzzle below?

The more of this there is, the less you see. What is it?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?