Rhetorical: Amulek testifies that the Atoning Messiah is also known as the Father. Rather than accept the trap of attempting to justify the mathematical question, Amulek rather takes the opportunity to further explain the mission of the Atoning Messiah. Rather than redeeming all men, or saving men in their sins, this Atoning Messiah that will come will "take upon him the transgressions of those who believe on his name, and these are they that shall have eternal life, and salvation cometh to none else."
Amulek testifies that the Atoning Messiah's mission will require some participation on our part, and that without such participation, we cannot be saved. What Amulek has done is say to Zeezrom that Zeezrom will not be saved. What Amulek has done is say to the crowd that they will not be saved. Amulek has turned the trap into a condemnation of those who were trying to trap him.
Textual: Amulek includes the phrases "he is the beginning and the end, the first and the last." Whatever the text on the plates, this particular formulation depends heavily on the alpha/omega imagery from the book of Revelations (Revelations 22:13; 21:6; Rev. 1:11, 17; 2:8.)