What is black when you buy it, red when you use it, and gray when you throw it away?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Count the number of balls in picture below:

Remove two matchsticks to make the below equation correct.

Find the Goldfish below the given Image.

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?