You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

What number should come in place of the question mark below?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What is the word or phrase?

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

What is the next number in this series?

4,12,84,3612....

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

Take one out and scratch my head, I am now black but once was red. What am I?