Understanding LCM and HCF

What is the least common multiple (LCM) of 4 and 5?

• 9

• 20

• 10

• 15

What is the highest common factor (HCF) of 12 and 16?

• 2

• 4

• 6

• 8

Find the LCM of 3, 6, and 9.

• 18

• 27

• 36

• 54

What is the HCF of 24 and 36?

• 6

• 8

• 12

• 18

If the LCM of two numbers is 60 and one of the numbers is 12, what could be the other number?

• 5

• 10

• 15

• 20

What is the LCM of 7 and 14?

• 7

• 14

• 21

• 28

Find the HCF of 9 and 27.

• 3

• 6

• 9

• 18

What is the LCM of 8 and 12?

• 16

• 24

• 32

• 48

If the HCF of two numbers is 1, what are these numbers called?

• Prime numbers

• Co-prime numbers

• Composite numbers

• Even numbers

What is the HCF of 15 and 25?

• 3

• 5

• 10

• 15