Which alphabet letter is a question?

Which flower has two lips?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

The peacock is a bird that does not lay eggs. How do they get baby peacocks?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?