Riddle #4

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?

You bury me when I am alive, and dig me up when I die. What am I?

When it comes to me, you go on red and stops on green. What am I?

I am a vehicle. I spell the same when you read me forwards as well as backwards. What Am I?

I am something to make you think, I am something to make you know. I am something to which the answer you might never know. What am I?

What word in the English language does the following: the first two letters signify a male, the first three letters signify a female, the first four letters signify a great man, the first six letters signify a drug, while the entire world signifies a great woman. What is the word?

My best buddy always makes mistakes. But I would easily get rid of the mistakes. What Am I?

Look at me. I can bring a smile to your face, a tear to your eye, or even a thought to your mind. But, I can't be seen. What am I?

I travel all over the world. But I could not move, just stay in a same single spot. What Am I?

I am pronounced as a one letter alphabet. I am written with three letters. I am complete with just two letters. I am double. I am blue I am black I am brown I am gray I am yellow and I am green. I can read from both ends. I appear the same every way! What am I?

I go around all the places, cities, towns and villages, but never come inside. What am I?