" Match each basic element of geometry with the correct picture by writing the number in the box." Can someone please help me I don't understand what I'm supposed to do.

The clear answer is clearly 25 is very clear to me

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.