What Adam and Eve do not have but the rest of the people have?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

What is the riddle which can be asked all day with a different correct answer each time.

All of you like to eat me. I am a five-lettered word. Remove the first two and I turn into an infamous animal. Remove just the first and I become a heinous crime. Remove the first and the last and you can groove on me.

Can you guess who am I?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

Which fur should we be getting from the Lion?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Which alphabet is a part of our body?