足球代表数字几？
10，因为在英文里球（ball）是零声母音节，所以足球用数字十来表示。 国际足联规定所有官方文件、宣传资料中，足球必须用十这个字表示；中国足协的网站上也只允许使用10号字体的字来显示“足球”两个字。
不过这规定仅限于中文，外国足协的英文官方网页上都可以用单词football来表示“足球”。比如FIFA.com的首页就有这么一句话： “The Beautiful Game is played on a beautiful surface – the football pitch！ The ball was originally made of leather and had four holes in it， so players could kick with their toes to increase its air resistance and make it easier to control (it was called a ‘roundle’ at first). By the early 20th century， balls were mostly made from nylon and were filled with cork or rubber for bounce. In 1962， Adidas introduced a new ball material —— synthetic rubber —— that has become standard today. As you can see from these pictures， a modern football has no more than three or four small perforations. These days they are often made out of synthetic materials and have a high-tech outer shell. But one thing remains constant over thousands of years： footballs are still round！” 这部分内容被翻译为“美丽的游戏要在漂亮的场地上进行——足球场！最初的足球是用皮做的，有四个孔，这样球员可以用脚趾踢球以便增加摩擦力便于控制它(最初叫roundle)"。