Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

On a beautiful Sunday morning, You ordered a hot tea to your hotel room and suddenly you remember an important thing that needed to be done right now will take around 3 minutes to complete.
Like most people you like your tea to be hot while drinking so, when should you pour cream in the tea?
1. straight away
2. Just people, you drink the team
3. Its does not matter

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

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

When can we add 2 to 11 and get 1 as the correct answer?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

If 2 workers can complete painting 2 walls in exactly 2 hours.

How many workers would be needed to paint 18 walls in 6 hours?