why number 8549176320 is one of a kind?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

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

How many triangles are there on the puzzle below?

On a windy rainy night , I was driving in my car.
When i reach the bus stand , i see three people waiting for the bus.

1. An old lady who needs an immediate medical attention
2. My Best Friend
3. Girl whom i love from childhood

My car is a two seat, so can you tell me , what i have done in this situation ?

A man dies of old age on his 25 birthday. How is this possible?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

You see me once in June, twice in November, and not at all in May. What am I?