SSC CGL 2026 | Arithmetic Maths | Vidyasagar Series | SSC CGL Maths Class | Aditya Ranjan Sir

Summary

Key Points

• The session is structured as an 8-hour marathon covering high-weightage arithmetic topics from SSC CGL, CHSL, and CPO papers (2023–2025), focusing on repeated question patterns and chapter-wise trends like Mensuration, Trigonometry, and Percentage. 4:54
• Profit and loss problems are simplified using logical shortcuts such as the **Butterfly Concept** (equal profit/loss scenarios), **Mumtaz Concept** (MP/CP relationships), and successive discount formulas like *(a + b - (a*b)/100)%,* while dishonest shopkeeper scenarios are solved via ratio-based calculations. 65:29
• Simple interest (SI) is taught using the formula **SI = (P × R × T) / 100**, with digital sum approximations and unit digit analysis to quickly eliminate incorrect options and solve problems without extensive calculations. 134:34
• Ratio and proportion problems are solved by converting terms into variables (e.g., *x*, *y*), using cross-multiplication for income/expenditure scenarios, and applying proportional formulas like *mean proportion = √(a²)* for multi-term ratios. 275:12
• Age-related problems leverage constant age gaps and algebraic methods, while diamond cutting problems demonstrate how value scales with the **square of weight**, requiring proportional adjustments when diamonds are divided. 345:06
• Compound interest (CI) techniques include the **Munni Method** (ratio-based rate/time calculations), difference formulas between SI and CI for consecutive years, and installment repayment strategies using present value equations like **Installment × (1 + R/100)^n**. 391:43
• The instructor emphasizes **daily practice of 25 math questions**, revision of formula books, and mock tests to simulate exam conditions, with a focus on accuracy and speed given the difficulty distribution: 60% easy, 25% moderate, and 15% difficult questions. 415:34
• Exam-specific strategies include analyzing past paper trends to prioritize high-weightage topics, using interactive polls and real-time scoring during sessions, and combining conceptual clarity with shortcuts to solve complex problems efficiently under time pressure. 486:20