How can i delete a question that i have asked from yahoo answers?

Like Anthony said, but if the question is resolved or more than 4 days old it can't be deleted.

Once resolved or in voting you can't delete them.

To delete a question while it's still open, go to the question , pass your mouse over the pencil icon in the toolbar below your question, click Delete Question.

http://help.yahoo.com/kb/index?page=cont%E2%80%A6

All you can do is hope it is reported as a violation even resolved questions can be removed that way.You could try emailing the YA team y_answrs_team@yahoo.com

explaining as to why it (they) should be deleted,. however Yahoo will only delete questions if they violate the community guidelines or reveal personal contact information (e.g. email address, full name, phone numbers, address etc).

The same as above pretty much applies to your answers.

Go to the question and click edit button and delete the question.

Go to your question. Click edit then delete. You must to this from a computer.

If you are on your phone then scroll to the bottom of the screen and press desktop version.