Prime Factorization, Math worksheet for Grade 7 at myTestBook.com

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	Question 1

	Which shows the prime factorization of 90?

	A.	2×2×3×5	B.	2×3×5×5
	C.	3×3×3×5	D.	2×3×3×5


	Question 2

	The prime factorization of 125 is _______.

	A.	3 × 5 × 5 × 5	B.	5 × 5 × 5
	C.	3 × 2 × 5 × 5	D.	3 × 3 × 7 × 5


	Question 3

	Which is a prime number?

	A.	91	B.	64
	C.	50	D.	79


	Question 4

	Which is NOT a prime number?

	A.	443	B.	149
	C.	49	D.	19


	Question 5

	Which is a composite number?

	A.	29	B.	121
	C.	53	D.	101


	Question 6

	Which shows the prime factorization of 147?

	A.	3×7×7	B.	3×3×7
	C.	3×5×6	D.	3×5×7


	Question 7

	Find the prime factorization of 420.

	A.	2×2×2×5×7	B.	2×5×5×5×7
	C.	2×2×3×3×7	D.	2×2×3×5×7


	Question 8

	Find the prime factorization of 1029.

	A.	2 × 3 × 3 × 7	B.	3 × 7 × 7× 7
	C.	2 × 2 × 5 × 7 × 13	D.	2 × 2 × 3 × 7 × 11


	Question 9

	Which shows the prime factorization of 1,242?

	A.	2 ×3²×23	B.	2 ×3³×21
	C.	2 ×3³×23	D.	2 ×5³×11


	Question 10

	Which shows the prime factorization of 225?

	A.	3 × 3 × 3 × 5 × 5	B.	2 × 3 × 5 × 6
	C.	3 × 3 × 5 × 5	D.	9 × 5 × 5

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Question No Answer
1 D
2 B
3 D
4 C
5 B
6 A
7 D
8 B
9 C
10 C

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