If an agent does not know whether his principal is parsimonious or generous, what fraction of terumah should he separate?
Halachah 7 establishes three benchmarks: one sixtieth for a parsimonious owner, one fortieth for a generous one, and one fiftieth as the average when the owner's temperament is unknown.
Question 2
Which of the following individuals produces a separation of terumah that is completely invalid — not even effective after the fact?
Halachah 2 lists the deaf-mute (cheresh) among five whose separation is not terumah at all. By contrast, Halachah 4 classifies the blind person, mute-but-hearing, and naked person among those whose separation is valid after the fact, merely discouraged.
Question 3
According to Halachah 6, when can we apply the principle 'an agent is presumed to have carried out his mission'?
Halachah 6 rules that in matters of prohibition we presume the agent acted only when that presumption results in a stringency — if it would produce a leniency, we instead suspect that someone else (without authorization) made the separation.
Question 4
In Halachah 15, if a gentile separates terumah from his own produce in Eretz Yisrael and states that he did so 'so it should be like a Jew's,' what happens to that terumah?
Halachah 15 states that when a gentile expresses Jewish-style intent, we give the separated terumah to a priest. If he does not express such intent, we entomb it — lest it have been dedicated to heaven and thus forbidden for benefit.
Question 5
According to Halachah 9, if a principal verbally nullifies his agent's appointment but the agent (unaware) then separates terumah exactly as instructed, what is the ruling?
Halachah 9 rules that verbal revocation of agency does not have the power to invalidate terumah separation when the agent did not deviate from the principal's instructions — speech brought about the appointment, but speech alone cannot undo it for this purpose.