This is how you do it.
- Go to Yahoo and click "I cannot access my account"
- You will see "What is the problem you have been experiencing?"
- Click on "I forgot my password"
- Next page give the Yahoo id and type the captcha.
- Next option Yahoo will ask for the alternate mail the id user has given.Dont check it.
- Check on i cannot access my account.The next page you see is the real test.It will ask you to give so simple personal info like Date of birth,Location,Pets name etc.