If two people simultaneously need hatavat chalom, must a third person participate even if he did not dream that night?

Does the prohibition on altering biblical verses extend to changes other than singular/plural, such as shifting from third-person to second-person address?

Insertions in Birkat HaMazon

May both the reader and the person called up read aloud simultaneously, or must one be silent?

Haftarah

Should a person establish fixed Torah study sessions both in the daytime and at night?

Community Torah Scroll Obligation

Does the revi'it requirement apply the same way to children and adults? How is a revi'it calculated when two people each wash one hand and then one person washes the second hand?

Who Must Wash Hands for Bread

When multiple people are dining together, in what order should they wash their hands — does the most distinguished person wash first or last?

Bread Cooked or Fried

May a shamash who is serving two people join their meal to participate in a zimun (grace after meals quorum of three) without being explicitly invited?

Blessings on Bread-Like Foods