If eleven plus two equals one, what does nine plus five equal?

What makes this number unique: 8,549,176,320?

It is always ahead of me yet I can never see it. What is it?

A devotee visits 9 temples when he visits India. All these nine temples have one thing in common - there are 100 steps in every temple. The devotee puts the Re.1 coin after climbing up every step. He does the same while climbing down every step. At each temple, the devotee offers half of his money from his pocket to god. In this way, his pocket becomes empty after he visits the 9th temple.

Can you calculate the total amount he had initially?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

O_er_t_o_

Complete the missing letters of the given word.

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?