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

I am white when I am dirty, and black when I am clean. What am I?

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

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

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Can you write down eight eights so that they add up to one thousand?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

O_er_t_o_

Complete the missing letters of the given word.

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?