Can you replace the question mark with the correct number in the below table sequence?

What seven-letter word has hundreds of letters in it?

Which wheel of car does not rotate when you turn your car right?

What can you serve, but never eat?

81 x 9 = 801. What must you do to make the this equation true?

With the help clues provided in the image, can you find the 5 digit key?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

I am a word of 12 alphabets.

* Alphabets 12, 4, 7, 2, 5 : Eastern beast of burden
* Alphabets 1, 8, 10, 9 are street made famous by Sinclair Lewis.
* Alphabets 11, 3, 6 are past.

On whole it means a person suffering from delusions of greatness.

What Is it ?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?