Before Mount Everest was discovered, what was the highest mountain in the world?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

What have one eye but still cannot see?

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What demands an answer, but asks no questions

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?