Answer 1) The group number of the most nonmetallic group that contains metalloids is Group VI A.
Explanation : Astatine (At) is the elemental metalloid which is found in group VI A which is placed in the bottom of most nonmetallic groups containing oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and the radioactive element polonium (Po).
Answer 2) The group number of the most metallic group that contains metalloids is Group III A.
Explanation : Boron (B) is the metalloid which belongs to group III A which is the most metallic groups containing aluminum (Al), gallium (Ga), indium (In) and thallium (Tl). Amongst the placement in the top of metallic group Boron behaves like a metalloid.