The sum of the reciprocals of Rehman's ages, (in years) 3 years ago and 5 years from now is 13. Find his present age.
Let the present age of Rehman be x years.
Three years ago, his age was (x−3) years.
Five years hence, his age will be (x+5) years.
It is given that the sum of the reciprocals of Rehman's ages 3 years ago and 5 years from now is 13.
However, age cannot be negative.
Therefore, Rehman's present age is 7 years.