一個老壽星的兒子剛go to study at university.At his father's birthday,he said a question to everyone."in X^2 year.my father was X years old.so,did you guy know how old are my father?"A guest think for a moment and said."you father break the world record?!""No,my father haven't broke the record.someone are elder than him"
So,did you know how old is that old people?????????????????