Colleen divided integer a by −5 and got 8. Then she divided 8 by integer b and got −4. Find the quotient of integer a and integer b.

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.