What is the word or phrase?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

I can be cracked, made, told, and played. What am I?

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?