What is the Missing Number in This Series?

Last Problem:

There are 3 triplet brothers. They look identical.

The oldest is John, he always tells the truth.

The second is Jack, he always tells a lie.

The third is Joe, he either tells the truth or a lie.

Jimmie Dean went to visit them one day. He was wondering who was who. So he asked each person a question. He asked the one who was sitting on the left:

Who is the guy sitting in the middle?”.

The answer was “He is John.”

He asked the one who was sitting in the middle: “What is your name?”.

The answer was “I am Joe.”

He asked the one who was sitting on the right:

“What is the guy sitting in the middle?”.

The answer was “He is Jack.

Jimmie Dean got really confused. Basically, he asked 3 same questions, but he got 3 different answers. Which is not true?

1] left most is Joe

2] middle is Jack

3] right is John

4] middle is John

Answer:

4] middle is John

Today’s Problem:

What is the missing number in this series?

8 2 14 6 11 ? 14 6 18 12

1] 8

2] 6

3] 9

4] 11