Why is it very easy to weigh a fish?

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

Can you solve below mathematical equation?

2^1234 - 2^1233

I have an eye but still cannot see.

Who am I?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

Buy me, smell me or deliver me, I do not change.

Who am I?

Replace the question mark with the number below given a simple math problem.

Keyboard words are not in alphabetical order, Why?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?