Rich Tasks 14: Mondrian Puzzles

Piet Mondrian is a Dutch artist famous for his artworks made of rectangles.

Here is a challenge:

-Take a square canvas, say 4x4, 5x5, 6x,6 or 8x8. 
-Divide it into rectangles.
-The canvas must be entirely covered by non-overlapping rectangles.
-All side lengths must be whole numbers.
-No two rectangles can have the same dimensions. (You cannot have a 3x2 and a 2x3 rectangle together)
-What is the minimum difference between the area of the largest rectangle and the smallest?

Example: 7x7 canvas, lowest score is 8-3=5

Your Turn

Moderated from TedEd and Numberphile