Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

Using Only Five 5's and any mathematical operator make sum as 37

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

I add 5 to 9 and get 2. The answer is correct, so what am I?

What has a ring but no finger?

Move three sticks of the spiral below to form a square.

What is the next number in this series?

4,12,84,3612....