Do you have difficulty following a pattern? I like to do things my own way, and with knitting and crochet, that tends to involve a lot of math and logical thinking.
I recently completed this Cross-Over Long DC Hat. However, I never seem to have the yarn called for in the pattern, so modifications are always necessary. This hat was made with Boston chunky yarn on a 5.5 size hook. Since both the hook and yarn were bigger than the pattern called for, the number of stitches and rows needed to be reduced. Using chunky yarn the stitches increased at a faster rate than the pattern specified. Instead of 6, 12, 18, 24, 30 and 36 stitches for rounds 1-6, 9, 18, 27, 36, 43, and 52 were used instead. The initial 14 rounds of stitches which defined the top of the hat were reduced to only six rounds.
Who said crafts didn't count as math?