MathCastle
Groups and FieldsMediumNormal Subgroups and Quotient Groups

Normal Subgroups and Quotient Groups · Medium problem

In Q8/Z(Q8)Q_8/Z(Q_8), where Z(Q8)={1,−1}Z(Q_8) = \{1,-1\}, every nonidentity coset has the same order. What is that order?