Which number is NOT divisible by 9?

Answer 1

What are your choices?

What is your answer?

Answer 2

117
252
133
351

I don't have an answer I need help finding the answer.

Answer 3

Its 133.

Answer 4

Right.

Answer 5

Here is a little trick that works with 9 and 3

add up the digits of your number.
If that sum is divisible by 9, then so is the original number.
The same rule applies to 3

e.g.
is 12546 divisible by 3 ?
add them up to get 18
since 18 divides evenly by 3, so does 12546

notice that since 18 also divides evenly by 9, so does 12546