Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

If,

A = 1

B = 2

C = 3

...

...

Z = 26.

Based on above rule, you need to find an eleven letter word whose letter sum is equal to 52.

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?