-1
Make two squares the same size from rectangles with aspect ratio $1:2$
This time, select two sets of rectangles from the list
1, 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 16, 17, 18, 21, 23, 31
Some of the rectangles will be in both squares, no rectangle will be repeated in one square. No gaps or o...