# Prime Factors Quiz: Trivia Test!

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Joel Dodd
J
Joel Dodd
Community Contributor
Quizzes Created: 26 | Total Attempts: 181,309
Questions: 14 | Attempts: 2,082

Settings

.

• 1.

### A Prime Number has only how many factors?

• A.

1

• B.

2

• C.

>2

B. 2
Explanation
A prime number has only two factors, which are 1 and the number itself. This means that a prime number cannot be divided evenly by any other number except for 1 and itself. For example, the factors of the prime number 5 are 1 and 5, and there are no other factors. Therefore, the correct answer is 2.

Rate this question:

• 2.

### What are the first three prime numbers?

• A.

0, 1, 2

• B.

1, 2, 3

• C.

2, 3, 5

C. 2, 3, 5
Explanation
The first three prime numbers are 2, 3, and 5. Prime numbers are numbers that are only divisible by 1 and themselves. 0 and 1 are not prime numbers because they have additional divisors. 2 is the smallest prime number, followed by 3 and then 5. Therefore, the correct answer is 2, 3, 5.

Rate this question:

• 3.

### How many primes are even numbers?

• A.

1

• B.

0

• C.

All

A. 1
Explanation
Primes are numbers that are only divisible by 1 and themselves. However, the only even prime number is 2. All other even numbers are divisible by 2 and therefore not prime. Therefore, the correct answer is 1.

Rate this question:

• 4.

### Which set of numbers are all Primes?

• A.

33, 29, 41, 3

• B.

63, 71, 43, 81

• C.

5, 23, 11, 37

C. 5, 23, 11, 37
Explanation
The set of numbers 5, 23, 11, and 37 are all prime numbers. A prime number is a number that is only divisible by 1 and itself, and none of these numbers have any other divisors. Therefore, they are all prime numbers.

Rate this question:

• 5.

### The factors of 18 are 1, 2, 3, 6, 9, 18.

• A.

True

• B.

False

A. True
Explanation
The statement is true because the factors of 18 are indeed 1, 2, 3, 6, 9, and 18. Factors are numbers that can divide evenly into another number without leaving a remainder. In this case, all of the listed numbers can divide 18 without leaving a remainder, making them factors of 18.

Rate this question:

• 6.

### The Prime Factors of 18 are 1, 2, 3.

• A.

True

• B.

False

B. False
Explanation
1 is not a prime.

Rate this question:

• 7.

### What are the prime factors of 32?

• A.

2

• B.

2, 8, 16

• C.

1, 2, 4, 8, 16, 32

A. 2
Explanation
The prime factors of 32 are the numbers that can divide 32 without leaving a remainder and are also prime numbers. In this case, the only prime factor of 32 is 2, because 32 can be divided evenly by 2.

Rate this question:

• 8.

### Is 7 a prime factor of 84?

• A.

True

• B.

False

A. True
Explanation
A prime factor is a prime number that divides another number without leaving a remainder. To determine if 7 is a prime factor of 84, we need to check if 7 divides 84 evenly. By dividing 84 by 7, we get a quotient of 12 with no remainder. Therefore, 7 is a prime factor of 84.

Rate this question:

• 9.

### What are all of the factors of 84?

• A.

2, 3, 7

• B.

1, 2, 4, 21, 42, 84

• C.

1, 2, 3, 4, 7, 12, 21, 42, 84

• D.

1, 2, 3, 4, 7, 12, 21, 28, 42, 84

D. 1, 2, 3, 4, 7, 12, 21, 28, 42, 84
Explanation
The factors of a number are the numbers that divide evenly into that number without leaving a remainder. To find the factors of 84, we can start by dividing it by the smallest prime number, which is 2. 84 divided by 2 equals 42, so 2 is a factor of 84. Continuing this process, we divide 42 by 2 to get 21, which means 2 is a factor again. We repeat this process with the remaining factors until we reach the largest prime factor, which is 7. Therefore, the factors of 84 are 1, 2, 3, 4, 7, 12, 21, 28, 42, and 84.

Rate this question:

• 10.

### What are the prime factors of 84?

• A.

2, 3, 7

• B.

1, 2, 4, 21, 42, 84

• C.

1, 2, 3, 4, 7, 12, 21, 42, 84

• D.

1, 2, 3, 4, 7, 12, 21, 28, 42, 84

A. 2, 3, 7
Explanation
The prime factors of a number are the prime numbers that divide the number evenly. To find the prime factors of 84, we can divide it by prime numbers starting from 2. 84 divided by 2 is 42, which is still divisible by 2, resulting in 21. 21 is not divisible by 2, so we move on to the next prime number, which is 3. 21 divided by 3 is 7, and 7 is a prime number. Therefore, the prime factors of 84 are 2, 3, and 7.

Rate this question:

• 11.

### 9 is a Prime Factor of 81.

• A.

True

• B.

False

B. False
Explanation
A prime factor is a prime number that divides another number without leaving a remainder. The prime factors of 81 are 3 and 3, since 3 x 3 x 3 = 81. Therefore, 9 is not a prime factor of 81.

Rate this question:

• 12.

### 3 is the ONLY prime factor of 81.

• A.

True

• B.

False

A. True
Explanation
The statement is true because 3 is indeed the only prime factor of 81. A prime factor is a prime number that divides another number without leaving a remainder. In the case of 81, it can be expressed as 3 x 3 x 3, where 3 is the only prime factor. There are no other prime numbers that can divide 81 evenly. Therefore, the answer is true.

Rate this question:

• 13.

### The prime factors of 75 are:

• A.

1, 3, 5

• B.

3, 5

• C.

1, 3, 5, 15, 25, 75

B. 3, 5
Explanation
The prime factors of a number are the prime numbers that can divide the number without leaving a remainder. In this case, the prime factors of 75 are 3 and 5. This is because 3 and 5 are both prime numbers and they can both divide 75 without leaving a remainder. Therefore, the prime factors of 75 are 3 and 5.

Rate this question:

• 14.

### The prime factor of 193 is only 193.

• A.

True

• B.

False

A. True
Explanation
The prime factors of a number are the prime numbers that can divide the given number evenly without leaving a remainder. In this case, the number 193 only has two factors, 1 and 193. While 1 is not a prime number, 193 is. Therefore, the statement "The prime factor of 193 is only 193" is true.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Nov 03, 2023
Quiz Edited by
ProProfs Editorial Team
• Apr 26, 2011
Quiz Created by
Joel Dodd

Related Topics