IQ挑战 1How is it The old man is already sixty years old But he has olny fifteen birthdays.
问题描述：
IQ挑战 1How is it The old man is already sixty years old But he has olny fifteen birthdays.
so,How is it ,and when is his birthday
答
它是闰年的2月29日生的
所以说他只有四年才过一次生日