Verify whether this is a group or not
68201
Cyclic group of order $n$
116707
Prove or disprove: $(\mathbb{Z}^*, \cdot)$ and/or $(\mathbb{Z}^*, \div)$ is a group.
31687
Classification of groups of order 30
125498
Check whether subgroup is normal in $ S_4$
104460
When a group is cyclic
24181
Showing that $G$ is a group under an alternative operation.
117414
How would I prove what elements $S_3$ contains, and what its subgroups are?
124237
Group equals union of three subgroups
96910
Prove the following alternative group definition.
16637
How do I list the members of a group?
33152
Classifying groups of order 18
158873
Is every group the unit group of some ring?
15210
Group of order 6 proof
8125
Is "group" singular or plural?
153797
Is a quotient group a subgroup?
158368
Irrationals: A Group?
115849
Are the Groups having all subgroups of same order conjugate classified?