How many soviet republics (now independent countries) were a part of the Soviet Union?

What is the most populous Russian Speaking Country? 

Which Central Asian country was NOT the part of the Soviet Union?

When is the Russian (Orthodox) Christmas is celebrated?

What holiday, celebrated in Russian Speaking Countries, involves pancakes (блины)?

In which Russian Speaking Country is the famous cosmodrome located, from where the first human flew into space?

When is the Victory Day celebrated in most Russian Speaking Countries?

How much of the world’s land was covered by the USSR?

Which famous Russian poet had African ancestry?

Which Russian city was once the capital of Russia?

Which Azerbaijani singer was nicknamed the "Soviet Frank Sinatra"?