I forgot my yahoo password and security question but

Hello,
i have my yahoo mail in my iPad and it is working only in iPad because i saved my password for a long time there and still works ....now if i want to open in laptop or other device i cant open because i forgot my password and security question ...i only remember the first question and i cannot remember a second security answer please help me out from these ,,,,i can prove that it is my own account cause it still works in iPad....if i signed out that too i cant open my account ever ....please help me yahoo helper or any assistance