cmi-entrance 2023 Q8

cmi-entrance · India · pgmath Groups Group Order and Structure Theorems
Which of the following groups are cyclic?
(A) $\mathbb { Z } / 2 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$
(B) $\mathbb { Z } / 3 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$
(C) Every group of order 18.
(D) $\left( \mathbb { Q } ^ { \times } , \cdot \right)$
Which of the following groups are cyclic?\\
(A) $\mathbb { Z } / 2 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$\\
(B) $\mathbb { Z } / 3 \mathbb { Z } \oplus \mathbb { Z } / 9 \mathbb { Z }$\\
(C) Every group of order 18.\\
(D) $\left( \mathbb { Q } ^ { \times } , \cdot \right)$