Question

Which of the following numbers is prime? 12 15 7 6

Answer 1

Answer:

7

Step-by-step explanation:

A prime number is a number which has no factors other than itself and 1. In other words, this number can only be divided by itself and 1 and result in a whole number answer. All of the other choices can be divided by some other numbers and result in a whole number answer.

Factors of 12:

1, 2, 3, 4, 6, 12

Facotrs of 15:

1, 3, 5, 15

Facotrs of 7:

1, 7

Factors of 6:

1, 2, 3, 6

Answer 2

Answer:

The number (7) is a prime number.

What are prime and composite numbers?

• Prime numbers are such numbers that should have two factors, one and the number itself. An example of a prime number could be "2".

Factors of 2: 1 and 2 (Verifies the above definition)

• Composite numbers are such numbers that have more than two factors. An example of a composite number could be 4.

Factors of 4: 1, 2 and 4 (Verifies the above definition)

Option A

Given number: 12

Let's list the factors of this number.

• ⇒ Factors of 12:  1, 2, 3, 4, 6, 12

The number provided is not a prime number because the number has more than two factors. Therefore, Option A is not correct.

Option B

Given number: 15

Let's list the factors of this number.

• ⇒ Factors of 15:  1, 3, 5, 15

The number provided is not a prime number because the number has more than two factors. Therefore, Option B is not correct.

Option C

Given number: 7

Let's list the factors of this number.

• ⇒ Factors of 7:  1 and 7

The number provided is a prime number because the number has exactly two factors. Therefore, Option C is correct.

Option D

Given number: 6

Let's list the factors of this number.

• ⇒ Factors of 6:  1, 2, 3, and 6

The number provided is not a prime number because the number has more than two factors. Therefore, Option D is not correct.

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Learn more about Prime and Composite numbers:

• brainly.com/question/123961
• brainly.com/question/559568