Prime and Composite

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• 2
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• 4

Tags

CCSS.4.OA.B.4

What is the only even number that is prime?

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• 2
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• 10

Tags

CCSS.4.OA.B.4

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 its self.
  (1 and itself)

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 list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

Tags

CCSS.4.OA.B.4

Some students were asked to write a composite number.  Which student did NOT write a composite number?

• Alicia wrote 2.
• Bob wrote 9.
• Arianna wrote 15.
• Daniel wrote 21. 

Tags

CCSS.4.OA.B.4

All numbers that end with 5, except the number 5, are composite because they are divisible by 5

• True

• False

All even numbers, except the number 2, are composite numbers because they are divisible by 2

• False

• true

Which of the following is false

• 11 is a composite number 1x11=11

• 48 is a composite number because it's an even number, so it's divisible by 2

• 55 is a composite number because it ends with 5, so it is divisible by 5

• 100 is a composite number because it ends with zero and it's an even number

If a number is divisible by 2,3,5,7, it is a

• prime number

• composite number