Prime Numbers and Prime Factorization

Question 1

Which is a true statement about the number 1?

Revolt · Accepted Answer

One is a factor of every whole number since every number is divisible by itself.

Question 2

What is the prime factorization of 40?

Revolt · Accepted Answer

2 times 2 times 2 times 5

Question 3

Composite numbers have

Revolt · Accepted Answer

more than two factors.

Question 4

Rathan thinks all factors of even numbers are even. Is Rathan correct or incorrect?

Revolt · Accepted Answer

He is incorrect because the product of an even number and an odd number is even.

Question 5

What is the difference between the largest prime number less than 50 and the smallest composite number greater than 10?

Revolt · Accepted Answer

35

Question 6

What is the sum of the first five prime numbers?

Revolt · Accepted Answer

28

Question 7

Manuel created a factor tree and wrote the prime factorization of 60 shown below. What is Manuel’s error?

Revolt · Accepted Answer

He did not find the prime factors of 4.

Question 8

The prime factorization of a number is . Which is a true statement about the factors of the number?

Revolt · Accepted Answer

Fifteen is a factor of the number because both 3 and 5 are prime factors.

Question 9

The prime factorization of a number is . Which statement is true about the factors of the number?

Revolt · Accepted Answer

Twenty-one is a factor of the number because both 3 and 7 are prime factors.

Question 10

Ray created the list of factors for 48 below. 48: 1, 2, 3, 4, 6, 7, 8, 12, 16, 24, 48Which number should be removed from his list to make the list accurate?

Revolt · Accepted Answer

7

Prime Numbers and Prime Factorization Answers

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