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?

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?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

I’m tall when I’m young, and I’m short when I’m old. What am I?

The more of this there is, the less you see. What is it?

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

I am the fastest animal but cannot climb the tree. What am I?

Give it food and it will live; give it water and it will die.

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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?