Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Our product and our sum always give the same answer. Who are we?

What does this below rebus puzzle mean?

If eleven plus two equals one, what does nine plus five equal?

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?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Through your logical capabilities, can you make 7 an even?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?