Question

Which number is a prime number?A.4B.6C.7D.9

Answer 1

Step-by-step explanation

Prime numbers are divisible only by the number 1 or itself and t o prove whether a number is a prime number, first try dividing it by 2, and see if you get a whole number. If you do, it can't be a prime number. If you don't get a whole number, next try dividing it by prime numbers

so

Step 1

prove 4

`(4)/(2)=2\rightarrow whole\text{ number, so 4 is not prime}`

Step 2

prove 6

`\begin{gathered} 6 \\ (6)/(2)=3\rightarrow whole\text{ numer, so 6 is not a prime number} \end{gathered}`

Step 3

prove 7