Prime and Composite Numbers

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Tags

CCSS.4.OA.B.4

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Tags

CCSS.4.OA.B.4

Which number is composite?

• 11

• 13

• 21

• 23

Which number is NOT a factor of 10?

• 1
• 2
• 3
• 5

Tags

CCSS.4.OA.B.4

Which is a prime number?

• 15
• 17
• 21
• 39

Is 100 a prime or composite number?

• Prime
• Composite

Tags

CCSS.4.OA.B.4

What are all prime numbers divisible by?

• 1, 2, and itself
• 1 and itself
• Every number from 1-10
• They aren't divisable at all

Tags

CCSS.4.OA.B.4

Which of the following equations will NOT result in a multiple of 5?

• 11 x 5 = _
• 2 x 5 = _
• 6 x 5 = _
• 7 x 3 = _

Tags

CCSS.3.OA.B.5

CCSS.3.OA.C.7

Which of the following numbers shows all of the factors of 12?

• 1,2,3,4,6,12
• 1,2,3,4,6,8,12
• 1,2,4,6,12
• 2,4,6,8,10,12

Tags

CCSS.4.OA.B.4

What is a factor?

• "Factors" are the numbers you multiply to get another number. For instance, factors of 15 are 3 and 5, because 3×5 = 15, or 1 and 15, 1 x 15 = 15

• A factor is a number written in word form

• "Factors" tell you facts about all the numbers in the world