Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Find the missing letter in the last circle logically in the given below picture.

If your uncle’s sister is not your aunt, what relation is she to you?

what does the below rebus mean?

John replied, when asked how old he was. In 2 years he will be twice as old as he was five years ago.' How old is he ?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

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

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

The host of a game show, offers the guest a choice of three doors. Behind one is a expensive car, but behind the other two are goats.
After you have chosen one door, he reveals one of the other two doors behind which is a goat (he wouldn't reveal a car).

Now he gives you the chance to switch to the other unrevealed door or stay at your initial choice. You will then get what is behind that door.

You cannot hear the goats from behind the doors, or in any way know which door has the prize.

Should you stay, or switch, or doesn't it matter?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?