Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

The richest man in the city Mr Rechard is kidnapped. James Bond is appointed to the case. At the crime scene, a note is found written by Mr Richard. The note read:

"First of January, Fourth of October, Fifth of March, Third of June."

James Bond knew that somehow, the killer's name was hidden in the note. The following were the suspects:

Jack Richard, the son and the heir of property.
John Jacobson, the employee of Richard.
June Richard, the wife of Richard.

James Bond took only a few moments to deduce the killer's name. Can you tell who was the killer?

What is at the end of a rainbow?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

How many times can you subtract the number two from the number fifty?

What can go up a chimney down, but can’t go down a chimney up?

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

What is in seasons, seconds, centuries and minutes but not in decades, years or days?