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

What Word am I Looking For ?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What do you answer even though it never asks you questions?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

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 always drive my customer away.

Who am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?