Prime and Composite Numbers
Authored by Annie Waldow
Mathematics
4th - 5th Grade
CCSS covered
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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The number 132 is to be written as a product of its prime factors. Which one of the following is correct?
132 = 2 × 6 × 11
132 = 22 × 32 × 5
132 = 22 × 32 × 5
132 = 3 × 4 × 11
Tags
CCSS.6.EE.A.4
CCSS.6.EE.A.3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The number 240 is to be written as a product of its prime factors. Which one of the following is correct?
240 = 23 × 52
240 = 3 × 5 × 16
240 = 23 × 5 × 6
240 = 24 × 3 × 5
Tags
CCSS.6.EE.A.4
CCSS.6.EE.A.1
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
The number 756 is to be written as a product of its prime factors. Which one of the following is correct?
22 × 33 × 7
22 × 32 × 21
4 × 33 × 7
2 × 3 × 53
Tags
CCSS.6.EE.A.4
CCSS.6.EE.A.1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is the sum of the prime factors of 72?
11
12
13
5
5.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
First write 72 as a product of its prime factors:
72
= 2 × 36
= 2 × 2 × 18
= 2 × 2 × 2 × 9
= 2 × 2 × 2 × 3 × 3 (or 23 × 32) what is the sum?
Tags
CCSS.6.EE.A.3
6.
MULTIPLE SELECT QUESTION
1 min • 1 pt
What is the sum of the prime factors of 240?
16
14
240 = 2 + 2 + 2 + 2 + 3 + 5 = 16
240 = 24 × 3 × 5 =1 6
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bob and Cindy each choose any one of the prime numbers 2, 3 or 5 (their choice could be the same or different from the others).
Their numbers are then multiplied together (for example 3 × 3 × 2 = 18)
How many different products can there be?
27
10
12
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