Question

Which number is a factor of 30 and also a prime number?

A)4

B)5

C)6

D)11

*Note- Please answer correctly and show how you got the answer. I give medal and fan :D

Answer 1

30 = 2×3×5
The prime factors of 30 are the numbers 2, 3, and 5.

Answer 2

Begin with the lowest prime number that is a factor of 30. Divide by 2 to get the factor 15.
Now use the lowest prime number that is a factor of 15. Divide by 3 to get the factor 5 which is also a prime number.

Answer 3

You can also find the prime factors of a whole number by drawing a factor tree.