## let G is finite group, and every size squared of conjugacy class divides the order of G/Z(G), then G is Nilpotent? [closed]

or divides order of G/Frattini(G),

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This might be an interesting question when properly posed, but it is not now, so I am voting to close. – Igor Rivin Sep 3 at 1:48
I don't think the question is ill-posed. I do however think it is not suitable in its current form (mathoverflow.net/howtoask), so I am casting the 5th vote to close. – Yemon Choi Sep 3 at 3:22