The sum of the ages of a family of four is 129, and the ages of three of them are all square numbers. If the time goes back 15 years, the ages of three of them are square numbers. What is the age of the person whose age is not a square number now?
一家四口年龄和为129，其中三人的年龄都是平方数，如果时间倒退15年，有3人的年龄是平方数．那么现在年龄不是平方数的那个人的年龄是多少．
<result>24</result>