A man have a fourth of his life a boy, a fifth as a young man and a third as an adult.Then he spent 13 years in his old age.How old was him when he die.

Answer 1

Math appears to be your school subject, not the name of your school.

Answer 2

let his age be x

(1/4)x + (1/5)x + (1/3)x + 13 = x
times 60
15x + 12x + 20x + 780 = 60x
780 = 13x
x = 60