I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What jumps when it walks and sits when it stands?

What has many keys but can’t open a single lock?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

The dirtier I get, the whiter I look. 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 know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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