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Concept of Age Problems

Formulae & Concept:
If the present age of A is x yr , then
His age m yr ago was (x – m) yr and
His age after n yr will be (x+n) yr
If the age of person n1yr ago was x yr , after n2yr his age will be (x + n1+ n2) yr.
If the age of person n1yr will be x yr ,then his age n2yr ago was (x – n1- n2) yr.

For Example- A father said to his son, “I was as old as you are at the present
at the time of your birth”. If the father’s age is 38 years now, the son’s age five
years back was:

Explanation : Let the son’s present age be x years. Then,

=> (38 – x) = x

=> 2x = 38.

=> x = 19.

Therefore, Son’s age 5 years back (19 – 5) = 14 years.