Is one obligated to respond 'Amen' to all blessings one hears, not only zimmun?

What does a person who did not eat say when he enters while the mezamen (leader) is reciting 'Nivrak she'achalnu mishelo'?

3 opinions

What does a non-participant say when he enters while the others are already responding 'Baruch she'achalnu mishelo'?

3 opinions

Does someone who arrives after the respondents have already finished (and the mezamen has begun 'Baruch she'achalnu') still need to answer 'Amen'?

2 opinions

Does one who drank wine (but did not eat) with the group count as having participated for purposes of saying 'she'achalnu' in zimmun?

2 opinions

When zimmun is conducted with a quorum of ten, what formula does the non-participant use?

2 opinions

Does the same rule apply to a person who was present when the group finished eating but did not eat with them?

2 opinions

If a person responded 'Baruch u'mevorakh' with the group at zimmun and then later hears the mezamen recite 'Baruch she'achalnu mishelo,' must he also answer 'Amen' at the end?

2 opinions

What formula does a non-participant respond with at a wedding zimmun ('birkat nisuin') when ten are present?

1 opinions