What dose this mean?

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Triangle xyz has vertices x(1,3), y(0,0)

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?