What is the minimum value of the DENIED portion for a Biblical partial-admission oath?
The denied amount must be worth at least two silver me'in (the weight of 32 barleycorns of pure silver) to trigger a Biblical oath.
Question 2
A plaintiff claims ten needles worth one p'rutah total. The defendant admits one needle and denies one. Is he obligated to swear?
The Torah equates utensils to money (Exodus 22:6). For utensils, even a single item creates oath liability regardless of monetary value.
Question 3
The plaintiff claims a kor of wheat; the defendant admits a kor of barley. Is this partial admission?
Admission of a different species is not partial admission. The admission must be of the same type as the claim.
Question 4
The plaintiff claims a 10-liter lamp. The defendant admits a 5-liter lamp. Is this partial admission?
Since a 10-liter lamp can be melted or cut to weigh 5 liters, the smaller admission is of the same kind as the claim — triggering a Biblical oath.
Question 5
The plaintiff claims a maneh as a loan; the defendant says he never borrowed but owes 50 dinars as a deposit. Is this partial admission?
The Rambam (and his teachers) rule that admitting half the amount owed — regardless of whether the legal basis differs — constitutes partial admission triggering a Biblical oath.