Competitive Exams: Quantitative Aptitude - HCF/LCM (Set 1) | Concept of Maths

Question 1

What is the Highest Common Factor (HCF) of 12 and 18?

Accepted Answer

C) 6

Answer

A) 3

Answer

B) 2

Answer

D) 9

Question 2

What is the Lowest Common Multiple (LCM) of 8 and 12?

Accepted Answer

D) 24

Answer

A) 48

Answer

B) 16

Answer

C) 32

Question 3

What is the Highest Common Factor (HCF) of two prime numbers, such as 5 and 7?

Accepted Answer

A) 1

Answer

B) 35

Answer

C) 5

Answer

D) 7

Question 4

What is the Lowest Common Multiple (LCM) of 15 and 20?

Accepted Answer

A) 60

Answer

B) 45

Answer

C) 30

Answer

D) 80

Question 5

If the HCF of two numbers is 6 and their LCM is 36, and one of the numbers is 12, what is the other number?

Accepted Answer

B) 18

Answer

A) 30

Answer

C) 24

Answer

D) 36

Question 6

What is the Highest Common Factor (HCF) of 24 and 36?

Accepted Answer

B) 12

Answer

A) 24

Answer

C) 6

Answer

D) 18

Question 7

What is the Lowest Common Multiple (LCM) of 6, 8, and 12?

Accepted Answer

B) 24

Answer

A) 18

Answer

C) 12

Answer

D) 48

Question 8

What is the Highest Common Factor (HCF) of 15, 25, and 35?

Accepted Answer

A) 5

Answer

B) 75

Answer

C) 25

Answer

D) 15

Question 9

What is the Lowest Common Multiple (LCM) of 9 and 15?

Accepted Answer

A) 45

Answer

B) 90

Answer

C) 15

Answer

D) 30

Question 10

The Highest Common Factor (HCF) of two co-prime numbers is always:

Accepted Answer

A) 1

Answer

B) their product

Answer

C) 0

Answer

D) their sum