Calculation King | 30 Days Calculation Mastery | Gagan Pratap Sir | Bilingual | Edition - 2025

“Calculation King | 30 Days Calculation Mastery” by Gagan Pratap Sir is a bilingual (English + Hindi) book specially designed to help students master fast and accurate calculation techniques in just 30 days. This 2025 edition is highly useful for various competitive exams like SSC CGL & CHSL (Tier I & II), CPO, MTS, CDS, GD, Selection Post, and many others. The book provides clear strategies and shortcuts to boost your speed and accuracy in quantitative aptitude, making it an essential tool for exam preparation.