Prime Factors Quiz: Trivia Test!
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The factors of 18 are 1, 2, 3, 6, 9, 18.
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True
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False
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Explore the intriguing world of prime numbers with the Prime Factors Quiz: Trivia Test! This quiz assesses your understanding of prime numbers, their unique properties, and their role in number theory, enhancing foundational math skills.
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- 2.
Which set of numbers are all Primes?
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33, 29, 41, 3
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63, 71, 43, 81
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5, 23, 11, 37
Correct Answer
A. 5, 23, 11, 37Explanation
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:
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- 3.
A Prime Number has only how many factors?
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1
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2
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>2
Correct Answer
A. 2Explanation
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:
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- 4.
How many primes are even numbers?
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1
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0
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All
Correct Answer
A. 1Explanation
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:
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- 5.
What are the first three prime numbers?
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0, 1, 2
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1, 2, 3
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2, 3, 5
Correct Answer
A. 2, 3, 5Explanation
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:
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- 6.
Is 7 a prime factor of 84?
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True
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False
Correct Answer
A. TrueExplanation
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:
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- 7.
The Prime Factors of 18 are 1, 2, 3.
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True
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False
Correct Answer
A. FalseExplanation
1 is not a prime.Rate this question:
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- 8.
The prime factors of 75 are:
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1, 3, 5
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3, 5
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1, 3, 5, 15, 25, 75
Correct Answer
A. 3, 5Explanation
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:
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- 9.
3 is the ONLY prime factor of 81.
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True
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False
Correct Answer
A. TrueExplanation
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:
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- 10.
What are the prime factors of 84?
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2, 3, 7
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1, 2, 4, 21, 42, 84
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1, 2, 3, 4, 7, 12, 21, 42, 84
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1, 2, 3, 4, 7, 12, 21, 28, 42, 84
Correct Answer
A. 2, 3, 7Explanation
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:
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- 11.
The prime factor of 193 is only 193.
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True
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False
Correct Answer
A. TrueExplanation
A prime number is a whole number greater than 1 that has only two factors (divisors): 1 and itself. Since 193 cannot be divided evenly by any other whole number other than 1 and 193, it is a prime number. Therefore, its only prime factor is itself, 193.Rate this question:
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- 12.
9 is a Prime Factor of 81.
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True
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False
Correct Answer
A. FalseExplanation
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:
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- 13.
What are all of the factors of 84?
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2, 3, 7
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1, 2, 4, 21, 42, 84
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1, 2, 3, 4, 7, 12, 21, 42, 84
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1, 2, 3, 4, 7, 12, 21, 28, 42, 84
Correct Answer
A. 1, 2, 3, 4, 7, 12, 21, 28, 42, 84Explanation
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:
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- 14.
What are the prime factors of 32?
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2
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2, 8, 16
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1, 2, 4, 8, 16, 32
Correct Answer
A. 2Explanation
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:
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Current Version
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Dec 06, 2024Quiz Edited by
ProProfs Editorial Team -
Apr 26, 2011Quiz Created by
Joel Dodd
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