Doing RCs with a tiny attention span

I’m a math student and I have a habit of making do with tiny bits of information. When faced with 25 lines reading comprehensions, my brain gets overwhelmed with the influx of information and I get tired very quickly. Due to this, I end up having to read the RC 3-4 times and end up wasting precious minutes.

Advice on how to build up patience for the same?

Follow Greg’s main idea strategy. Just focus on that until you get better at it

Make a habit of reading till you’re doing your GRE preparation . Start with articles that interest you from established sources like the Economist ,NYTimes, New Yorker , The Atlantic etc. . Read one article a day or you can pick a book and read few pages per day (Non-fiction is preferred as the writing/wording matches with the passages you tend to encounter in GRE ).

When I was preparing ,I often used to read movie reviews from the New Yorker as they were not boring and contained a lot of GRE words .
Eg:https://www.newyorker.com/culture/culture-desk/django-unchained-put-on-revenge-and-the-aesthetics-of-trash