ISEE Lower Level Quantitative : Prime Numbers

Study concepts, example questions & explanations for ISEE Lower Level Quantitative

varsity tutors app store varsity tutors android store

Example Questions

2 Next →

Example Question #11 : Prime Numbers

Which of the following is the product of two distinct prime numbers?

Possible Answers:

Correct answer:

Explanation:

There are two key terms in this question that we need to understand in order to answer the question correctly: product and prime numbers.

Product is the answer to a multiplication problem.

Prime numbers are numbers that are greater than and only have factors of the number and itself. For example is a prime number because it's greater than and the factors of are only and .

To find the correct answer, we need to know the factor pairs for our answer choices. The correct answer will have a factor pair of two prime numbers.

Let's look at our answer options:

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is . Though  is a prime number,  is not.

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is . Both and  are prime numbers, thus  is our correct answer.

Example Question #12 : Prime Numbers

Which of the following is the product of two distinct prime numbers?

Possible Answers:

Correct answer:

Explanation:

There are two key terms in this question that we need to understand in order to answer the question correctly: product and prime numbers.

Product is the answer to a multiplication problem.

Prime numbers are numbers that are greater than and only have factors of the number and itself. For example is a prime number because it's greater than and the factors of are only and .

To find the correct answer, we need to know the factor pairs for our answer choices. The correct answer will have a factor pair of two prime numbers.

Let's look at our answer options:

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is . Both  and are prime numbers, thus  is our correct answer.

 

Example Question #13 : Prime Numbers

Which of the following is the product of two distinct prime numbers?

 

Possible Answers:

Correct answer:

Explanation:

There are two key terms in this question that we need to understand in order to answer the question correctly: product and prime numbers.

Product is the answer to a multiplication problem.

Prime numbers are numbers that are greater than and only have factors of the number and itself. For example is a prime number because it's greater than and the factors of are only and .

To find the correct answer, we need to know the factor pairs for our answer choices. The correct answer will have a factor pair of two prime numbers.

Let's look at our answer options:

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is , and  is not a prime number.  

- A factor pair for  is , and  is not a prime number.

- A factor pair for  is . Both and  are prime numbers, thus  is our correct answer.

 

2 Next →
Learning Tools by Varsity Tutors