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

What question can you never answer yes to?

What jumps when it walks and sits when it stands?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

Solve the puzzle by telling what does below picture means.

Can you place six X (crosses) in below board without making three in a row in any way ?

Which country gets ill every time?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

What is the word or phrase below?
R | E | A | D

Can you Find and name the hidden bird in the picture below ?