HCF, LCM, Prime Factorization

Find the HCF for 18, 36, and 81

• 3

• 2

• 6

• 9

Tags

CCSS.6.NS.B.4

Which of the following is a prime number?

• 19

• 39

• 49

• 69

Tags

CCSS.4.OA.B.4

Which of the following is a prime factor of the number 50?

• 1

• 3

• 5

• 10

Tags

CCSS.4.OA.B.4

Joe has listed the first 4 multiples of 7 as: 
7   14    22     28
Which one is incorrect?

• 7
• 14
• 22
• 28

Tags

CCSS.4.OA.B.4

What is the least common multiple (L.C.M.) of 4 and 5?

• 40

• 60

• 1

• 20

Identify the correct list for all the factors 24....

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 4, 6, 8, 12, 24

• 1, 2, 3, 4, 6, 12, 24

• 1, 2, 3, 4, 6, 9, 12, 24

Tags

CCSS.4.OA.B.4

Which number is a Composite number?

• 3

• 5

• 11

• 12

A prime number is _____.

• a number that has only one factor.

• a number that has at least two factors.

• a number that has more than two factors.

• a number that has only two factors.

  (1 and itself)

Tags

CCSS.4.OA.B.4

What is the 6th multiple of 8?

• 8

• 40

• 48

• 56

Which shows the prime factorization of 84?

• $2\times2\times3\times7$

• $2\times2\times3\times3\times7$

• $4\times21$

• $7\times21$