Number Classification Quiz
Practice quiz on Number Classification (Reasoning / Logical Ability). 10 exam-style questions with explanations.
About This Quiz
Number Classification Quiz — Questions with Solutions
All 10 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.
Q1.Find the odd one: 2, 3, 5, 9, 11
- A.5
- B.9
- C.11
- D.2
Show answer
Answer: B. 9
Others are prime.
Q2.Find the odd one: 16, 25, 36, 40
- A.40
- B.36
- C.16
- D.25
Show answer
Answer: A. 40
Others are squares.
Q3.Find the odd one: 8, 27, 64, 120
- A.8
- B.27
- C.64
- D.120
Show answer
Answer: D. 120
Others are cubes.
Q4.Find the odd one: 12, 18, 27, 30
- A.18
- B.12
- C.30
- D.27
Show answer
Answer: D. 27
Others are even.
Q5.Find the odd one: 11, 13, 17, 21
- A.17
- B.21
- C.11
- D.13
Show answer
Answer: B. 21
21 is not prime.
Q6.Find the odd one: 49, 64, 81, 90
- A.90
- B.49
- C.64
- D.81
Show answer
Answer: A. 90
Others are squares.
Q7.Find the odd one: 5, 10, 15, 22
- A.5
- B.10
- C.15
- D.22
Show answer
Answer: D. 22
Others are multiples of 5.
Q8.Find the odd one: 13, 17, 19, 25
- A.25
- B.17
- C.19
- D.13
Show answer
Answer: A. 25
25 is not prime.
Q9.Find the odd one: 3, 9, 27, 82
- A.3
- B.9
- C.27
- D.82
Show answer
Answer: D. 82
Others are powers of 3.
Q10.Find the odd one: 144, 169, 196, 210
- A.210
- B.169
- C.196
- D.144
Show answer
Answer: A. 210
Others are squares.
Frequently Asked Questions
Is Number Classification Quiz free to attempt on AajExam?
Yes. Number Classification Quiz is completely free. You only need a free AajExam account to track your score, view detailed solutions and unlock cross-attempt analytics.
How long does it take to complete Number Classification Quiz?
Number Classification Quiz runs on a 10-minute timer in real exam-style conditions. The clock starts the moment you click Start, mirroring the time pressure of the actual exam.
Are detailed solutions provided?
Yes. Every question on Number Classification Quiz ships with a complete step-by-step solution, the underlying concept, and (where applicable) shortcut tricks. You can also discuss any question with the AajExam community.
Can I attempt Number Classification Quiz multiple times?
Yes. You can attempt this quiz as many times as you like. Each attempt is recorded separately so you can track improvement in score, accuracy and time-management.
Which government exams does this quiz prepare me for?
Classification questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.