Can you find out who is the kidnapper in below Picture and why, Explain ?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

ENEMY = 2 * LINK
LINK + 2 = HELL

Then what will be TAXI + HELL? Select from the options below:
a) ROTTEN
b) DANGER
c) HEAVEN
4) MORTAL

Can you solve the below tricky visual equation?

Rebus Puzzle Definition: A rebus is an illusion device that uses pictures to represent words or parts of words.
What does This Rebus Puzzle Identify?

What is next number in the pattern below:

131 517 192 123 ?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

During a secret mission, an agent gave the following code to the higher authorities
AIM DUE OAT TIE MOD

However, the information is in one word only and the rest are fake. To assist the authorities in understanding better, he also sent them a clue, If I tell you any one character of the code, you can easily find out the number of vowels in the codeword.

Can you find out the code word?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.