[誤] We have a match on single-numbered days of each month.
[正] We have a match on odd-numbered days of each month.
注:single 是“單一的,單個的”意思如:single-eyed(獨眼的),single-handed(獨手的,單槍匹馬的)等。而odd 才表示“單數(shù)的,奇數(shù)的”意思,如:odd houses(單號門牌的房子),odd month(有三十天的月份)等。