What does this simple rebus mean?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

A Japanese ship is sailing in the Indian Ocean. The captain of the ship feels tired and decides to take shower to be rejuvenated. He goes to take the shower after keeping his diamond-studded Rolex watch and gold chain on the table.
When he comes back after 15 minutes, he finds them missing. There are 4 crew members on the ship and he calls them one by one to ask them what they were doing in that duration.

Following are the answers:
1. Crew 'A' who is the cook replies that he was cooking mutton for the crew members.
2. Crew 'B' who is a housekeeper tells that he was sleeping in his room.
3. Crew 'C' who is the engineer says that he was checking on the generator.
4. Crew 'D' who is another housekeeper says that he was correcting the hoisted flag that was put upside down.

It took only a couple of seconds for the captain to find the thief. Can you find the thief too?

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

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Can you identify if it's a murder or a suicide ?

What does the below rebus puzzle mean?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

In the image given, you can find several triangles. Can you count them all?

It belongs to you, but other people use it more than you do. What is it?