Mastering HCF, LCM, and Factors

What is the HCF of 24 and 36?

• 12

• 24

• 18

• 6

Find the LCM of 8 and 12.

• 30

• 24

• 16

• 20

List the prime factors of 60.

• 3, 5, 10

• [2, 3, 5]

• 1, 6, 12

• 2, 4, 15

Is 49 a composite number? Why or why not?

• 49 is neither prime nor composite.

• Yes, 49 is a composite number.

• 49 is a prime number.

• 49 is an even number.

Identify a pair of co-prime numbers from the following: (8, 9), (12, 15), (14, 21).

• (12, 15)

• (14, 21)

• (8, 9)

• (8, 12)

A gardener has 36 red roses and 48 yellow roses. What is the maximum number of bouquets he can make if each bouquet has the same number of each type of rose?

• 24

• 18

• 6

• 12

What is the HCF of 18, 30, and 42?

• 9

• 6

• 3

• 12

Calculate the LCM of 5, 10, and 15.

• 30

• 15

• 25

• 35

Determine if 25 and 32 are co-prime numbers.

• Yes, 25 and 32 are co-prime numbers.

• No, 25 and 32 share a common factor.

• Yes, 25 and 32 are both even numbers.

• No, 25 and 32 are not co-prime numbers.

If a school has 120 students and wants to divide them into groups of 15, how many groups can they form?

• 8

• 12

• 10

• 6