What is the ruling on greeting non-mahram men with "Salam"? And is it sufficient to say "Salam 'alaykum" instead of "As-salamu 'alaykum"? And what is the ruling on speaking with non-mahram men about religious matters if the questioner needs an answer?

It is permissible for a woman to greet a man with "Salam" (peace), and vice versa, provided there is no fear of temptation (fitna) and no private seclusion. The best form of greeting is "Assalamu Alaikum" (Peace be upon you).

It is permissible for a woman to speak with a non-mahram man when there is a need, provided she adheres to Islamic guidelines, such as not speaking in a soft, alluring, or drawn-out manner; because that leads to temptation. A woman's voice is not considered 'awrah (something that must be concealed) unless it is made soft and alluring.

It is permissible for a woman to issue fatwas (religious edicts) and answer religious questions if she possesses knowledge or conveys the قول (saying) of trustworthy scholars. Otherwise, she must remain silent and be cautious about speaking on religious matters without knowledge.