Question

1到80中有几个数字3

Answer 1

（1）共有十七个3。3/13/23/33/43/53/63/73

30/31/32/34/35/36/37/38/39

（2）共有一个3

（3）无数个3 例如1.3/1.33/1.333……

2.3/2.03/2.0003……

Answer 2

1到20为：

first、second、third、fourth、fifth、sixth、seventh、eighth、ninth、tenth、eleventh、twelfth、thirteenth、fourteenth、fifteenth、sixteenth、seventeenth、eighteenth、nineteenth、 twentieth

21到40为：

twenty-first、twenty-second、twenty-third、twenty-fourth、twenty-fifth、twenty-sixth、twenty-seventh、twenty-eighth、twenty-ninth、thirtieth、thirty-first、thirty-second

thirty-third、thirty-fourth、thirty-fifth、thirty-sixth、thirty-seventh、thirty-eighth、thirty-ninth、fortieth

41到60为：

forty-first、forty-second、forty-third、forty-fourth、forty-fifth、forty-sixth、forty-seventh、forty-eighth、forty-ninth、fiftieth、fifty-first、fifty-second、fifty-third、fifty-fourth、fifty-fifth、fifty-sixth、fifty-seventh、fifty-eighth、fifty-ninth、sixtieth

61到80为：

sixty-first、sixty-second、sixty-third、sixty-fourth、sixty-fifth、sixty-sixth、sixty-seventh、sixty-eighth、sixty-ninth、seventieth、seventy-first、seventy-second、seventy-third

seventy-fourth、seventy-fifth、seventy-sixth、seventy-seventh、seventy-eighth、seventy-ninth、eightieth

81到100为：

eighty-first、eighty-second、eighty-third、eighty-fourth、eighty-fifth、eighty-sixth、eighty-seventh、eighty-eighth、eighty-ninth、ninetieth、ninety-first、ninety-second

ninety-third、ninety-fourth、ninety-fifth、ninety-sixth、ninety-seventh、ninety-eighth、ninety-ninth、one hundredth