What digit makes 3,71_ divisible by 9?

What digit fills the blank?

1 Answer
Mar 7, 2018

See a solution process below:

Explanation:

For a number to be divisible by #9# the digits in the number need to either add up to 9 or add up to another number divisible by 9 such as 18, 27, 36, etc.

#3 + 7 + 1 = 11# we can add #7# to this to get #11 + 7 = 18# which is divisible by #9#.

Therefore, 3,717 is divisible by 9

#3714/9 = 413#