Unit 1 Checkpoint 1 Review

List the factors of the number 20:

• 10, 15, 20, 25
• 5, 10, 15, 30
• 1, 2, 3, 4, 5
• 1, 2, 4, 5, 10, 20

List multiples of the number 20:

• 20, 40, 60, 80, 100

• 15, 35, 55, 75, 95
• 1, 2, 3, 4, 5

• 1, 2, 4, 5, 10, 20

True or False? 14 is a prime number.

• True

• False

True or False? 7 is a prime number.

• True

• False

A class of fourth graders made factor posters, like you did. Here is one of them. Even though the number at the top of the poster is covered, Jason says it has to be a prime number. Do you agree with Jason? Why or why not? Select two answers.

• A. Yes, Jason is right. The number must be prime because it only has factors of 1 and itself.

• B. No, Jason is wrong. The number could be composite if it has more than two factors.

• C. Yes, Jason is right. The array shows the number can only be arranged in one row, which means it’s prime.

• D. No, Jason is wrong. The array might also represent a composite number that can be arranged in different ways.

Complete the equation: 6 x 7 = ?

• 56
• 48
• 36
• 42

Complete the equation: 8 x 9 = ?

• 72
• 81
• 56
• 64

Complete the equation: ___ x 9 = 81

• 9
• 7
• 10
• 8

Complete the equation: ___ x 4 = 48

• 10
• 8
• 6
• 12

Mia has 4 toy cars. Her cousin has 6 times as many toy cars as Mia.
Write an equation that shows exactly how many toy cars Mia’s cousin has. Select two choices.

• Cousin's toy cars = 24
• 4 x 6 = C

• Cousin's toy cars = 18
• 6 x 3 = C