LCM and HCF

A prime number is...

• a number that has only one factor.

• a number that has more than two factors.

• a number that has at least two factors.

• a number that has only two factors.(1 and itself)

Tags

CCSS.4.OA.B.4

Which one is a multiple of 4?

• 24

• 33

• 27

• 18

Tags

CCSS.4.OA.B.4

Find the HCF of 21 and 28

• 3

• 7

• 4

• 14

Find the HCF of 12 and 15 ?

• 2

• 3

• 2 x 3

• 60

Find the HCF of 40 and 60?

• 10

• 20

• 30

• None of the above

What is the LCM of 6 and 8 ?

• 12

• 24

• 18

• 36

Which answer lists all the factors for 40?

• 1,2,4,5,8,12,14,40

• 1,2,4,5,8,10,20,40

• 1,2,3,4,5,8,10

• 1,2,4,5,6,7,8,9,10

Tags

CCSS.4.OA.B.4

What are the first 5 prime numbers in ascending order?

• 2,3,4,5,11

• 1,2,3,5,11

• 2,3,4,5,11

• 2,3,11,7,5

Tags

CCSS.4.OA.B.4

Which of these numbers is not prime?

• 25

• 17

• 23

• 37

Tags

CCSS.4.OA.B.4

Find the highest common factor of 36 and 84.

• 5

• 4

• 6

• 12