REVIEW QUESTIONS ON GEMARA AND RASHI
prepared by Rabbi Eliezer Chrysler
Kollel Iyun Hadaf, Jerusalem
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Eruvin 51
ERUVIN 51 - was generously dedicated by an anonymous donor in Los Angeles.
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1)
(a) How long before nightfall must one designate his new place of residence
(by the distant trunk of the tree) for it to be effective?
(b) Then how will Rava (the undisputed author of this opinion) explain our
Mishnah, which writes 've'Chashchah Lo', implying that it would get dark by
the time he reached the tree (two explanations)?
2)
(a) Rabah suggested to his co-traveler Rav Yosef, that they designate a
specific tree that he spotted in the distance as their Makom Shevisah. What
did Rav Yosef reply?
(b) What did Rabah answer him?
(c) Why did he quote Rebbi Yossi even though he never said it?
(d) What is the word *Nimuko* *(Imo) the acronym of?
3)
(a) What do we learn from the Pasuk in Beshalach ...
- ... "She'vu Ish Tachtav"?
- ... "Al Yetzei Ish mi'Mekomo"?
(b) The latter Derashah is actually derived from a series of Derashos:
'Makom' from 'Makom', 'Makom' from 'Nisah', Nisah' from 'Nisah' ... 'Chutz'
from 'Chutz'. The final Derashah is when we learn "u'Matza Oso Go'el ha'Dam
*mi'Chutz* li'Gevul" (Matos) from the Pasuk in Mas'ei "u'Madosem *mi'Chutz*
la'Ir ... *Alpayim* ba'Amah". How do we know to learn from *this* Pasuk,
rather than from the Pasuk there "mi'Kir ha'Ir *va'Chutzah"*, (where the
Torah writes *"Elef* Amah")?
(c) Since when must the words of a Gezeirah Shavah be exactly like? Do we
not learn fr om a Gezeirah Shavah "*u'va* ha'Kohen" from "*ve'Shav*
ha'Kohen" (that the second time the mark of Tzara'as appears on the walls of
a house, one does not simply demolish it, as the Pasuk suggests, but first
replaces the brick before giving it another week to see if the mark returns
and spreads - just like he did when it appeared the first time) despite the
fact that "u'va" and "ve'Shav" are not exactly the same?
4)
(a) What do we learn from the word "es *Pe'as* Kedmah", mentioned in the
same Pasuk in Mas'ei, in connection with the 'Gezeirah Shavah' quoted above?
(b) What then, is the problem with Rebbi Chanina ben Antignos, who holds
that the Techum Shabbos of an indivudual is measured as a circle, and not as
a square?
(c) How does the Gemara answer this Kashya, from the Pasuk "*Zeh* Yihyeh
Lahem Migreshei he'Arim"?
(d) How do the Rabbanan explain the word "Zeh"?
5)
(a) One is Chayav for carrying four Amos in the street. What does four Amos
really mean?
(b) Rava tested his disciples. What did he ask them?
(c) What did Rav Papa and his friends answer?
Answers to questions
51b---------------------------------------51b
6)
(a) According to Rav Nachman, Rebbi Meir and Rebbi Yehudah agree by
'bi'Mekomi', and they argue by 'be'Makom P'loni'. What is the basis of
their Machlokes, i.e. over which basic principle do they argue?
(b) In which case does Rebbi Yehudah agree (that a 'rich man' cannot make an
Eruv without bread?
(c) Who is the author of the section of our Mishnah 've'Zu Hi she'Amru,
he'Ani Me'arev be'Raglav', and what is the Chidush?
(d) And who is the author of the Seifa of the Mishnah 'Lo Amru Me'arvin
be'Pas Ela Lehakel Al he'Ashir, she'Lo Yetzei vi'Ye'arev be'Raglav'?
7)
(a) According to Rav Chisda, the Tana'im argue 'bi'Mekom P'loni, and not by
'bi'Mekomi'. In which case do they agree?
(b) And in which case does Rebbi Meir then argue with Rebbi Yehudah?
(c) Who is the author of the Seifa of the Mishnah 'Lo Amru Me'arvin be'Pas
Ela Lehakel Al he'Ashir she'Lo Yetzei vi'Ye'arev be'Raglav', according to
Rav Chisda?
8)
(a) The Beraisa supports Rav Nachman's interpretation. Which two Chumros
must we contend with, one according to Rebbi Meir, and one according to
Rebbi Yehudah?
(b) What proof does Rebbi Yehudah bring for his opinion, from the poor men
of K'far Shichin and K'far Chananyah, who made an Eruv on foot to go and
fetch dried figs and raisins in a year of famine from the residents of
Aruma?
9)
(a) Rebbi Yehudah in the next Mishnah, permits someone who has set out on
Friday afternoon to walk four thousand Amos to his house in the next town,
to complete the journey, even though his friend initially convinced him to
return. Why is only *he* permitted to complete the journey, and not the
other residents of the town? How is this a proof for Rav Nachman?
(b) Why are we forced to say ...
- ... that the man set to go to his house in the second town, and not just be Koneh Shevisah
- ... that he owned a house in the other town too?
- ... that he did not say 'Shevisasi be'Makom Peloni'?
10)
(a) What did Rabah bar Rav Chanan used to do every Friday when he wanted to
walk from Artivna to Pumbedisa?
(b) What did Abaye say to him that forced him to retract?
11)
(a) How does the Gemara try to prove that someone who makes an Eruv with
bread has an extra four Amos (i.e. 2004 Amos), just like someone who makes
an Eruv on foot?
(b) On what grounds is this proof rejected, leaving the Sha'aleh open?
Answers to questions
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