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1)

(a) What does Abaye say in a case where Reuven gives Shimon five measures of wheat in lieu of the Zuz Ribis that he owes him, when the going price is four measures per Zuz? How much is Shimon obligated to return?

(b) On what grounds does Rava obligate him to return all five?

(c) In a similar case, but where Reuven gives Shimon a coat instead of the four Zuzim Ribis that he owes him, Abaye permits Shimon to return the four Zuzim, and not the coat.
On what grounds does Rava insist that he returns the coat itself?

(a) What does Rava say in a case where Reuven, who owes Shimon twelve Zuzim, then rents him an apartment which normally goes for ten Zuzim, in lieu of the Ribis? How much is Shimon obligated to return?

(b) Rav Acha from Difti asked Ravina why Shimon cannot argue that he only agreed to accept the apartment at twelve Zuzim, because he thought it was to his advantage, but not if it will cost him two Zuzim.
What did Ravina reply?

(a) Our Mishnah permits 'Marbin al ha'S'char', but not 'Marbin al ha'Mecher'.
What is the meaning of ...

1. ... 'Marbin al ha'S'char'?
2. ... 'Marbin al ha'Mecher'?

(b) How do Rabah and Rav Yosef explain the difference between the two? Why is ...

1. ... 'Marbin al ha'S'char' permitted? On what principle is it based?
2. ... 'Marbin al ha'Mecher' prohibited?

(c) What does Rava learn from the Pasuk in Behar 'ki'S'chir Shanah be'Shanah'?

(a) Rav Nachman permits Tarsha.
What is 'Tarsha'?

(b) How does Rav Nachman reconcile his opinion with the Seifa of our Mishnah, which forbids this very case?

(c) Rav Papa maintained that *his* Tarsha (selling his date-beer in Tishri, when the beer was cheap, on credit, to be collected at market-time in Nisan, when the price had risen).
What made him think that it was certainly permitted?

(d) Why did Rav Shisha B'rei de'Rav Idi disagree with him?

(a) Rav Chamah maintained that his Tarsha was definitely permitted. Following the standard procedure of Tarsha (where the purchaser paid the more expensive rate (in this case, of the town where they heading) than the current one, what was different about his Tarsha? What was the case?

(b) On what grounds did he then permit it?

(c) And how do we counter the argument that it ought nevertheless to be considered Ribis because the purchasers had the trouble of selling the goods (that remained his) without receiving anything in return (see Tosfos DH 'Nakti')?

(d) We rule like Rav Chama, Rebbi Elazar and Rebbi Yanai.

1. Which Rebbi Elazar?
2. Which Rebbi Yanai?

6)

(a) If Reuven pays Shimon half the cost of his field, on the understanding that the moment he brings the balance he will acquire the entire field (otherwise the sale is cancelled), it is forbidden for either of them to eat the fruit.
What needs to be added to our Mishnah for the prohibition to extend to Shimon?

(b) What is the reason for the prohibition?

(a) Rav Huna permits Shimon to eat the fruit.
What does Rav Anan say?

(b) Assuming that they do not argue, how will we establish ...

1. ... Rav Huna?
2. ... Rav Anan?

(c) Rav Safra quotes a Beraisa of 'Ribis de'Bei Rebbi Chiya which cites all possible computation, which Rava explains. We have already explained the cases where Shimon is permitted to eat the fruit (Rav Huna), and where neither is permitted to do so (Rav Anan).
Which is the case where ...

1. ... both are permitted to eat it?
2. ... Reuven may do so?

(d) What does Rav Huna B'rei de'Rav Yehoshua mean when he says that the Tana who forbids both men to eat the fruit cannot be Rebbi Yehudah? Why would Rebbi Yehudah have permitted it?

(a) Why does the Beraisa forbid a creditor to stipulate with the debtor that should the latter wish to sell the house or the field that he gave him as a security, he should sell it to *him* for a small sum that he will add to the money owing?

(b) What would he have to stipulate for the case to be permitted?

(c) Which Tana cannot be the author of this Beraisa either (or the next one)?

(a) What does the Tana of the Beraisa say about someone selling a house or a field and stipulating that the purchaser should return it, should he (the seller) find the money (to redeem it)?

(b) The Tana does however, permit *the purchaser* to make the stipulation.
Why is that? Which clause does Rava add that removes the prohibition?

(c) What is the basic difference between the Reisha and the Seifa?

(a) When Reuven, who had sold Shimon a field without Achrayus, perceived Shimon looking dejected (for fear of losing his money), he assured him that he would recompense him from the best of his fields, should the need arise. What do we mean by 'without Achrayus'?

(b) What did Ameimar rule in this case? Why is that?

(c) Rav Ashi asked Ameimar from Rava, who just explained 'Seifa de'Amar Lei mi'Da'atei'.
What is Rav Ashi's Kashya?

(d) What did Ameimar reply?

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