MCQ on HCF & LCM for Part A General Aptitude - Attempt Quiz Here!

By Astha Singh|Updated : January 21st, 2023

Hi Aspirants,

Are you looking for Online Mock Quiz for CSIR NET Preparation? Do you want to practice the most important questions for CSIR-NET preparation for the Life Sciences subject, then you have come to the right place.

We at BYJU'S Exam Prep always provide convenient and easy-to-use study materials for the candidates preparing for CSIR NET 2023 exam. We already received excellent feedback from many aspirants for all the study materials, and we hope these MCQ questions will also help you to make your weaker areas stronger and help you to clear your CSIR NET 2023 exam with flying colors.

Multiple Choice Questions On HCF & LCM

Question 1. The proportion among the three numbers is 3: 4: 5 and their LCM is 1800. The second number is:

1. 90
2. 120
3. 100
4. 110
Question 2.  A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting point?

1. 26 minutes 18 seconds
2. 42 minutes 36 seconds
3. 45 minutes
4. 46 minutes 12 seconds

Question 3. If x: y is the ratio of two whole numbers and z be their HCF, then the LCM of those two numbers is:

1. XY
2. xz/y
3. xy/z
4. XYZ
Question 4.  The HCF of the two numbers is 15 and their LCM is 225. If one of the numbers is 75, then the other is:
1. 105
2. 90
3. 60
4. 45

Question 5. LCM of two numbers is 2079 and their HCF is 27. If one of the numbers is 189, the other number is:

1. 297
2. 584
3. 345
4. 348

Question 6. The LCM of two positive integers is twice the larger number. The difference of the smaller number and the GCD of the two numbers is 4. The smaller number is :

1. 12
2. 6
3. 8
4. 10

Question 7. What is the HCF (Highest Common Factor) of 57 and 513?

1. 10
2. 57
3. 3
4. 47

Question 8. HCF and LCM of two numbers are 19 and 969 respectively. If one number is 57 find the other Number.

1. 340
2. 388
3. 337
4. 323

Question 9. The last digit of 340 is:

1. 1
2. 3
3. 7
4. 9
Question 10. What is the greatest five-digit number that is completely divisible by 8, 15, 16, 21, and 5?
1. 99120
2. 99870
3. 9872
4. 9769
 Answer Keys for HCF & LCM MCQs Question Number Answer Key 1 B 2 D 3 D 4 D 5 A 6 C 7 C 8 D 9 A 10 A

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