The Quants section changed its pattern from 34 questions to 26 questions in CAT 2020 with a sectional time limit of 40 minutes. Anyone can score 90+ percentile in quant if they focus on important topics which have more weightage.
Based on the recent trends, arithmetic and algebra carries a weightage of 60-70% of the total questions.
These are the important topics in quant, also there may be a few other questions too.