Today someone sent me this problem i spent about 15 minutes on this on my prime i would instantly look at it and would be able to tell 20^2+21^2 = 841 so its max problem solved
in my aspects of my problem solving as well i have noticed a decline i have stopped doing mathematics from 2 years and haven't done anything productive is it because of lots of pmo during the years that lead to this cognitive decline fuck life ig