A person joins a congregation that has already read half the Megillah. What must he do?
Halachah 2 rules that reading out of sequence is invalid; he must read the entire Megillah in order from beginning to end.
Question 2
A non-Hebrew speaker hears the Megillah read aloud in Hebrew from a proper Hebrew scroll. Does he fulfill his obligation?
Halachah 3 states that a non-Hebrew speaker who hears the Megillah in Hebrew script fulfills his obligation even without understanding the words.
Question 3
A scribe is copying a Megillah from a source scroll and intends to fulfill his reading obligation from the scroll he is currently writing. Has he fulfilled his obligation?
Halachah 6 specifies that one fulfills the obligation only by reading from a scroll that was completely written at the time of reading — not from the scroll being written.
Question 4
What is the minimum requirement for giving gifts to the poor on Purim?
Halachah 16 derives from Esther 9:22 'gifts to the poor' — two gifts to two poor people, i.e., one gift to each of two poor people.
Question 5
According to the Rambam, which Purim mitzvah takes highest priority when one has limited means?
Halachah 17 states explicitly that it is preferable to be more liberal with donations to the poor than to be lavish in the feast or in sending portions, because gladding the hearts of the unfortunate is the greatest happiness.