LCM & HCF Quiz 3
Practice quiz on LCM & HCF (Quantitative Aptitude). 5 real exam questions.
About This Quiz
LCM & HCF Quiz 3 — 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.Find the HCF of 72 and 120.
- A.12
- B.24
- C.36
- D.48
Show answer
Answer: B. 24
Prime factors: 72 = 2³ × 3², 120 = 2³ × 3 × 5 ⇒ HCF = 2³ × 3 = 24.
Q2.The LCM of 5, 10, 15 is:
- A.20
- B.30
- C.40
- D.50
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Answer: B. 30
LCM=30.
Q3.HCF of 12 and 16?
- A.2
- B.3
- C.4
- D.6
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Answer: C. 4
Common factors: 1,2,4 → highest=4.
Q4.Find the HCF of 9 and 15.
- A.1
- B.3
- C.5
- D.9
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Answer: B. 3
HCF=3.
Q5.The LCM of 6 and 8 is:
- A.12
- B.16
- C.24
- D.48
Show answer
Answer: C. 24
LCM(6, 8) = 24.
Frequently Asked Questions
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Can I attempt LCM & HCF Quiz 3 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.