The Russians don't maintain any T-34s except for parades - the huge number is made up of huge numbers of stored T-55s, T-62s and T-72s. They've actually been scrapping their old T-64s and T-80s so the total number might have dropped by a few thousand in the last couple of years.
As long as Trump doesn't pull the US out of NATO, Russia's tanks could easily be destroyed by American and EU aircraft and other tactical weapons systems. Even twenty thousand of them.
Yes, but only in the context of all-out warfare. Tanks can stay perfectly well hidden from air attacks as long as they don't move. It's only when they come out in combat that they can be destroyed from the air.
The little blurb that accompanies the front page feature for this quiz today said "Strictly for defensive purposes, naturally." In the case of Taiwan, that statement is accurate.
Scoring
You scored 3/15 = 20%
This beats or equals 1.5% of test takers
The average score is 12
Your high score is 3