It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

You can hear me, but you can't touch or see me.

What am I?

A man is trapped in a room. The room has only two possible exits doors. Through the first door there is a room constructed from magnifying glass. The blazing hot sun instantly fries anything or anyone that enters. Through the second door there is a fire-breathing dragon. How does the man escape?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?