I'm confused i have 2 answers to this problem and i don't know which is the right one. can anyone ?

Its 9 because 20 times 9 equal 180 which i helped

The answer is 9. To answer the question you would have to do 180 divided by 20. The ones place in each number, cross each other out so you would only have to do 18 divided by 2 to answer it.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.