SSC CGL 2027 · Quantitative Aptitude (Maths) · Chapter 1
Number System & HCF/LCM
Number System and HCF/LCM for SSC CGL Tier 1 and Tier 2: types of numbers and decimals, divisibility rules and missing-digit questions, factors and perfect squares, remainders and unit digits, and HCF and LCM, including the bell, tile and group word problems. After the five topic sections come the speed methods, 34 solved questions, three practice sets, 70 questions from SSC papers of 2022 to 2025 and a 15-minute chapter test.
Topics in this chapter
- 1
Types of Numbers, Place Value and Decimals
45 min read · Quiz included
- 2
Divisibility Rules and Missing Digits
50 min read · Quiz included
- 3
Factors, Primes and Perfect Squares
50 min read · Quiz included
- 4
Remainders and Unit Digits
50 min read · Quiz included
- 5
HCF and LCM
50 min read · Quiz included
- 6
Shortcuts & Speed Methods
40 min read · Quiz included
- 7
Solved Questions
90 min read · Quiz included
- 8
Practice Set 1
25 min read · Quiz included
- 9
Practice Set 2
25 min read · Quiz included
- 10
Practice Set 3
25 min read · Quiz included
- 11
PYQ Practice Set 1
35 min read · Quiz included
- 12
PYQ Practice Set 2
35 min read · Quiz included
- 13
Chapter Test (25 Questions, 15 Minutes)
15 min read · Quiz included
- 14
Quick Revision
15 min read · Quiz included