I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Decode this picture on T-Shirt and tell what it says ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Rumel, A detective who was mere days from cracking an international smuggling ring has suddenly gone missing. While inspecting his last-known location, you find a note:

710 57735 34 5508 51 7718

Currently, there are 3 suspects: Bill, John, and Todd. Can you break the detective's code and find the criminal's name?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

What is the fastest way to double your money?

What you cannot hold but it is yours?

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?