More Patchwork

A lady was presented, by two of her girl friends, with the pretty pieces of silk patchwork shown in our illustration. 
It will be seen that both pieces are made up of squares all of the same size—one 12x12 and the other 5x5. 
She proposes to join them together and make one square patchwork quilt, 13x13, but, of course, she will not cut any of the material—merely cut the stitches where necessary and join together again. 

A friend assures her that there need be no more than four pieces in all to join up for the new quilt. 

Could you show her how this little needlework puzzle is to be solved in so few pieces?

See answer

Math Genius