O_er_t_o_

Complete the missing letters of the given word.

I am white when I am dirty, and black when I am clean. What am I?

You are playing a game with your friend Jack. There are digits from 1 to 9. You both will take turn erasing one digit and adding it to your score. The first one to score 15 points will win the game.

Would you want to play first or second?

PS: The sum should be exactly 15.

I want to fill my bucket using both cold and hot water.
I have two taps for both cold and hot water. The hot water tap fills the bucket in exact 6 hours and the cold water tap fills the bucket in exact 4 hours.
I turn both of them simultaneously but I forgot to turn off another tap which removes the water out of the bucket. This tap can empty the bucket in 12 hours.

How Long will it take to fill the bucket?

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

What is the next number in this series?

4,12,84,3612....

Which English verb becomes past tense just by rearranging the letters?

Which is the correct shadow of the bird?

Different lights make me strange by changing me into different sizes. What am I?