Does a zimun obligation arise for three who sat down to eat and recited Hamotzi but have not yet eaten a kezayit?

When two people eat together and one knows how to recite Birkat Hamazon but the other does not, may the knowledgeable one fulfill the obligation for the other?

6 opinions

When two people eat together and both know Birkat Hamazon, should each recite it independently or may one recite for both?

3 opinions

Are three people who ate together obligated to make a zimun, and are they forbidden from separating?

3 opinions

When two people eat together, is it a mitzvah to seek a third person in order to create an obligation of zimun?

2 opinions

When may a group of six or more separate into smaller groups for zimun?

4 opinions

May a large group that cannot hear the zimun leader split into smaller groups of three (rather than ten) to facilitate zimun?

4 opinions

When do diners who did not all begin eating together still combine for zimun?

4 opinions across 3 eras

Do riders on animals or people walking while eating join for zimun?

2 opinions