What does it mean?

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.

If two's company, and three's a crowd, then whats four and five ?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Which is faster, Heat or Cold ? Explain.

What is black when you buy it, red when you use it, and gray when you throw it away?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

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?

Find out which of the given views in the picture is accurately the top view of the given pyramid.