PreTest Prime and Composite

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

• 7
• 14
• 22
• 28

Which sentence is true about composite numbers?

• it is odd

• it is even

• it has only 2 factors

• it has more than 2 factors

Tags

CCSS.4.OA.B.4

Which statement about prime numbers is true?

• All prime numbers are odd.

• Prime numbers have only 2 factors.

• The first three prime numbers are 3, 5, 7.

• All prime numbers can be divided by 2 with no remainder.

Tags

CCSS.4.OA.B.4

20 is a composite number. Why?

• Because it has more than two factors.

• Because its only factors are only 1 and itself.

Tags

CCSS.4.OA.B.4