Squares

Problem:


Solution:

To compute the values, we start with I, its side must be 1 because it is the difference between C and D.

Next, given I is 1, we now know H is 7 because it is the difference of C and I
We also know E is 10 because it is the sum of D and I

Given E and H, now we know G is 4 because it is the difference of E and H

Given H and C, we also know B is 15 because it is the sum of H and C

Given E and G, we also know F is 14 because it is the sum of E and G

Last but not least, given F and G, we know it is 18 because it is the sum of F and G, incidentally, it is also B + H - G.

The whole thing is 32 x 33, it is not a square. A + B gives 33 but A + F give 32.