Quilt math: I refer to it as "convoluted quilt math but it works." My husband and both of our kids majored in math and my husband is a retired high school math teacher and our daughter is now a high school math teacher. Interestingly enough though, when I do have to ask for help, he messes it up worse than I ever have. I usually get it if he'll be quiet and let me explain what's going on but he likes to tell me what's going on and where my thinking is wrong. I've learned though, once he gives me his figures, do it my way and mine will work - he's not a quilter.