LCM & HCF Quiz
Practice quiz on LCM & HCF (Quantitative Aptitude). 5 real exam questions.
About This Quiz
LCM & HCF Quiz — Questions with Solutions
All 5 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.
Q1.Lowest common multiple of 6 and 8 is:
- A.12
- B.16
- C.20
- D.24
Show answer
Answer: D. 24
LCM(6,8)=24.
Q2.What is the HCF of 45 and 75?
- A.15
- B.20
- C.25
- D.30
Show answer
Answer: A. 15
Greatest common factor is 15.
Q3.Find HCF of 20, 30, 40.
- A.5
- B.10
- C.15
- D.20
Show answer
Answer: B. 10
HCF=10.
Q4.LCM of 15, 20, 30 = ?
- A.30
- B.60
- C.120
- D.90
Show answer
Answer: B. 60
LCM=60.
Q5.Find the LCM of 18 and 24.
- A.48
- B.72
- C.36
- D.96
Show answer
Answer: B. 72
LCM = 2³ × 3² = 72.
Frequently Asked Questions
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Can I attempt LCM & HCF 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.