Table of Contents

Classification for Competitive Exams

Identify odd elements from groups using logical rules. Key topic in SSC CGL, CHSL, Banking PO/Clerk.

2. Types of Classification

A. Word Classification

Example: (a) Apple (b) Banana (c) Carrot (d) Orange
Answer: (c) Carrot (vegetable among fruits)

B. Number Classification

Example: (a) 13 (b) 17 (c) 23 (d) 27
Answer: (d) 27 (non-prime)

4. Practice Questions

Word Problems:

1. (a) Java (b) Python (c) Mercury (d) C++
Answer: (c) Mercury (planet)

Number Problems:

2. (a) 28 (b) 45 (c) 36 (d) 81
Answer: (a) 28 (non-multiple of 9)

5. Exam Tips

  • Word Problems: Check categories (animals/tech/professions)
  • Number Problems: Test primes/squares/digit sums