Complete CSAT | Basics Of Numbers 🔥 | UPSC 2026

Crack CSAT 2026 with a strong foundation! 💪
In this session, we cover the Basics of Numbers — one of the most important topics for the CSAT exam.
Learn all key concepts, tricks, and types of questions that frequently appear in UPSC Prelims.
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TimeStamps:

00:00:00 - Introduction
00:01:26 - Batch Updates
00:02:05 - UPSC CSAT Exam
00:05:14 - UPSC CSAT Syllabus
00:07:03 - Approach towards CSAT preparation
00:12:50 - Topics to be covered
00:14:10 - Representation of Number
00:23:29 - Questions
00:34:55 - Number Tree
01:07:08 - Questions
01:35:31 - Maximum & Minimum value
01:43:50 - Questions
01:59:56 - Thank You
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Summary Key:
Topic: Basics of Numbers (CSAT Foundation Series)
Focus: Building strong conceptual understanding
Covers: Number System, Divisibility, HCF-LCM, Remainders, Unit Digits
Includes: Shortcuts + Practice + PYQs
Ideal For: UPSC 2026 Aspirants (CSAT Paper II)
Objective: Strengthen speed, accuracy, and logic.

Number System fundamentals 🧮
Divisibility Rules & Factors
HCF & LCM made easy
Unit Digit, Remainder & Cyclicity
Shortcut tricks for faster solving
PYQs & Practice questions
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