Math Chapter Wise question with answer

Q01 Let φ(n) denotes the Euler totient function, then the value of φ(15) is equal to: English · OAVS TGT 2019 Q02 Let G be a commutative group of order 202. Then the number of element(s) of order 2 in G is English · Bihar (TRE 1.0) -2023 Q03 Let N be normal subgroup of a group G and f: G → G N is a mapping defined by f(x) = xN ∀ x∈G, then f is English · RPSC PGT 2022 Q04 Let 'H' be a subgroup of 'G' and 'N' be a normal subgroup of G, then H∩ ∩ ∩N is - English · UPPSC Polytechnic Lecturer 2021(II) JDD-75-PGT TIER II-X-15 28.06.2015 Q05 Let G be a cyclic group of order 6. Then, the number of elements g ∈ G, such that G = <g> is English · UP PGT 2021 Q06 Let (Z, o), where a o b def = a + b + 1, a, b ∈ Z, is a commutative group. Let a–1 be inverse of a, then a–1 is equ... English · UP PGT 2021, 2016 UPPCS (Pre) 2006