Can you find the odd number in the following?

2716, 4135, 5321 and 7145

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

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.

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

What you cannot hold but it is yours?

Can you count the number of triangles in the picture below?

I have an eye but still cannot see.

Who am I?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What is the word or phrase?