The more you take me, the more you leave me behind.
Who Am I?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

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

It can be easily calculated that the digits 0 to 9 can be arranged into 3628800 distinct ten-digit numbers.

But do you know how many of these numbers are prime?

If eleven plus two equals one, what does nine plus five equal?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Do You See It?