LCM Quiz
Practice quiz on LCM (Numerical & Mental Ability). 10 exam-style questions with explanations.
About This Quiz
LCM 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.The LCM of 4 and 6 is
- A.8
- B.24
- C.12
- D.10
Show answer
Answer: C. 12
12.
Q2.The LCM of 5, 10 and 15 is
- A.150
- B.50
- C.30
- D.15
Show answer
Answer: C. 30
30.
Q3.The LCM of 9 and 12 is
- A.36
- B.72
- C.18
- D.108
Show answer
Answer: A. 36
36.
Q4.The LCM of 8, 12 and 16 is
- A.24
- B.32
- C.96
- D.48
Show answer
Answer: D. 48
48.
Q5.The smallest number divisible by 2, 3, 4 and 5 is
- A.20
- B.120
- C.60
- D.30
Show answer
Answer: C. 60
60.
Q6.The LCM of 3, 5 and 7 is
- A.21
- B.105
- C.15
- D.35
Show answer
Answer: B. 105
105.
Q7.The LCM of 14 and 21 is
- A.84
- B.7
- C.294
- D.42
Show answer
Answer: D. 42
42.
Q8.Three bells ring every 4, 6 and 8 minutes. They ring together after
- A.48 minutes
- B.24 minutes
- C.12 minutes
- D.18 minutes
Show answer
Answer: B. 24 minutes
LCM = 24.
Q9.The smallest 4-digit number divisible by 12 is
- A.1020
- B.1012
- C.1000
- D.1008
Show answer
Answer: D. 1008
12 x 84 = 1008.
Q10.The LCM of 18 and 24 is
- A.36
- B.72
- C.144
- D.48
Show answer
Answer: B. 72
72.
Frequently Asked Questions
Is LCM Quiz free to attempt on AajExam?
Yes. LCM 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 LCM Quiz?
LCM 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 LCM 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 LCM 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?
LCM & HCF 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.