Some cities that are geographically are located within Siberia that would easily make the top 20 are for some reason omitted, mainly east of the Urals and the Far East. Where's Yekaterinburg, Chelyabinsk, Vladivostok, Khabarovsk, Yakutsk, and Blagoveshchensk?
I think I only put cities that are listed inside the Siberia region. I would consider most cities east of the Ural mountains to also be Siberia but these are the ones inside the federal region. I probably should've specified that in the quiz description.