Too many words in flashcards

Probably because I’ve been neglecting the flashcards, I’m now presented with 200 words at a time when I click on flashcards. This is running over the cup. How can I get it down to a reasonable number, say<50?

Which flashcards are you referring to? The LingQs of the Day? You can control those settings on the Settings page. From the lesson page, if you are accessing your flashcards there, you can go to the Vocabulary page and refine the list of flashcards.