4th Grade My Math Chapter 8 Test B

Tell whether each number is prime or composite:

9

Tell whether each number is prime or composite:

12

Tell whether each number is prime or composite:

7

Tell whether each number is prime or composite:

21

Mrs. Higgins has 24 name taps for her students. She is arranging them in an array on a desk. Find all the factor pairs of 24 to see what kind of arrays can be made.

• (1, 6)
• (2, 8)
• (1, 24), (2, 12), (3, 8), (4, 6)
• (3, 10)

Which picture shows equivalent fractions?

• 
• 
• 

Michael ran 1/3 of a mile. Brian ran 3/9 of a mile. Did they run the same distance?​ ​ (a)  

• Yes, 1/3 and 3/9 are equivalent.
• No, Michael ran more than Brian.
• No, Brian ran more than Michael.

Find the prime number

• 10
• 9
• 7
• 4

39 is an example of a ​ (a)   number

• composite
• prime
• even

Match the following multiples and factors of each number.

• 15, 30, 45, 60, ...

• Multiples of 4

• 1, 2, 4

• Multiples of 15

• 1, 3, 5, 15

• Factors of 15

• 4, 8, 12, 16, 20, ...

• Factors of 4

Answer explanation

Multiples are when you count by a certain number.

Factors are when you break a number down into what multiplies to it.

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