Is it permitted for a man and woman to be in the same house but in separate rooms, or is it a violation of yichud? Sources can be found here .

If one's mind wanders during Megillah reading, does he fulfill his obligation? What is the best way to focus one's attention during Megillah reading? Sources can be found here .

When should the Purim Seudah be scheduled when Purim is on Friday? Can one extend the Purim Seudah into Shabbos? Sources can be found here .