Which number should replace the question mark?

What is wrong in the below Picture?

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?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

How is the moon similar to a dollar?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

When it is alive we sing, when it is dead we clap our hands. What is it?

Can you solve the below geography rebus by decoding the below rebus ?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?