A man is 3 years older than his wife and four times as old as his son.  If the son becomes 15 years old, after 3 years, what is the present age of the wife?

60 51 48 45

45

Son's present age = 15 - 3 = 12 years Father's present age = 12 × 4 = 48 years  Wife's age = 48 - 3 = 45 years