Whats another way i can write 4 times "X"?
options:
1. 4-x
2 .4/x
3. 4+x
4. 4x

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.