You simply need a Yahoo Mail ID. Through yahoo mail address you can register and then sign in to yahoo answers.
yahoo answers is better than this
Yahoo is a web portal containing links to more topics, e-mail, web search, news, web pages, answers, etc.. WikiAnswers is only designed to handle answers, but is better designed, and less ad cluttered. It is subjective. WikiAnswers is probably better than Yahoo Answers; Yahoo as a whole is more useful.
billing.yahoo.com
Google tried Google Answers in the past and it is now out of commission. Yahoo! already has their own answers site, Yahoo! Answers. Answers.com is a competitor to Yahoo! Answers. There's no way to predict whether Google or Yahoo might buy out Answers.com or whether Answers.com might buy out web properties from Google or Yahoo in the future.
Ask.com is a question answer based search engine while yahoo is a web search engine. In other words, we can ask questions and give answers in Ask.com while in Yahoo we can search anything available on web using some keywords. Yahoo also offers question and answers based services through its answers.yahoo.com.
Probably not, it would still be in their web logs and so on.
Yahoo! wrote Yahoo! Answers.
No - they always have the answerer's name and picture on.
Yahoo Answers is better: Question Structure WikiAnswers is designed more to answer universal and relatively simple one line questions. Yahoo answers can answer more complicated and personalized questions. Audience Yahoo currently has a wider community who comes to both ask and answer questions. As Yahoo is a web portal, people who come to Yahoo for other things (eg. web search, e-mail or news) may also find themselves asking or answering questions. The personal nature of Yahoo attracts more people to Yahoo. WikiAnswers has a smaller user base, and is not tied to a major portal. Answers On WikiAnswers, answers tend to be relatively better. Answers can evolve over time, as opposed to only having to be entered within a few days of the initial question. Yahoo Answers has much more false/unhelpful answers, and much more spam. User Powers On Yahoo Answers, every user is treated equally in terms of powers, but there are limits to how much one can do each day depending on the level they are at. One vote counts as one vote. On Wiki Answers, supervisor powers trump regular users. Previewing Answers On Yahoo Answers, you can preview your answer; on Wiki Answers, you can not.
Yahoo answers questions
According to Yahoo Answers,you need to be 13 to become a member of Yahoo Answers.