I never was very good at math.
I just realized I miscalculated for an Around the World quilt for my niece. I drew it all out on graph paper and counted how many half square triangles I would need. Then I cut that many squares. As I am sewing the first blocks together I realize I will need half the number of each color because each square is only half each color. I have enough squares to make almost two quilts. I was going to be short four blocks, but I'm not now.