What does below rebus means ?

Why is Saturday stronger than Monday?

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

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?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

There is something which is always coming but never arrives?

How far can you walk into the woods?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

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?