You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A person was found dead on a big green land with no trees or buildings around. When the police arrived, they found a piece of rock lying next to him and the man was wearing clothes comprising of red, blue and yellow colours.

Can you tell who the person is and what was the cause of death?

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?

If a wheel has 54 spokes, how many spaces are there between the spokes?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

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

What has to be broken before you can use it?

I make two people out of one. What 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 ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?