Answer:
B. 15
Step-by-step explanation:
We can say 3 is a factor of 15 because the number 15 is divisible by 3. To find out if 3 is a factor of a number, we can simply divide this number by 3 and the quotient must come with no remainder. In this case, 15 divided by 3 is 5.
However, there is also a much easier way to determine if a number is divisible by 3 or if 3 is one of its factors. We can add the numbers of that numerical value together, and if the sum of those numbers is divisible by 3, then yes it is divisible by 3 and 3 is one of its factors.
For example:
171
We add:
1 + 7 + 1 = 9
9 is a number divisible by 3, therefore 3 is one of the factors in the number 171.
Same goes for the following examples below (:
8214
99
51
1626
hope it helps(:
