An art gallery hangs 7 small square pictures on a wall. Each square picture has side length 11cm

a.) Write a calculation for the total area of the wall covered by pictures

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.

The answer should be c.