Present ages of father and the son are in the ratio of 6 :1 respectively. 4 year hence the ratio of their ages will become 4:1 respectively. What is the son's present age ? 

Hitesh is 40 years old and Rohit's age is 60 years, how many years ago his age ratio was 3: 5?

The ratio of age of two boys is 5 : 6. After two years the ratio will be 7 : 8. The ratio of their age after 12 years will be 

Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. What is Sagar's age at present?

Direction : Each of the questions below consists of a question and two statements numbered I and II are given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read both the statements and
Give answer
(A) If the data in statement I alone are sufficient to answer the question, while the data statement II alone are not sufficient to answer the question.
(B) If the data in Statement II alone are sufficient to answer the question, while the data in statement I alone are not sufficient to answer the question.
(C) If the data in statement I alone or in Statement II alone are sufficient to answer the question.
(D) If the data in both the statement I and II are not sufficient to answer the question.
(E) If the data in both the statement I and II together are necessary to answer the question.

What is the mother’s present age?
I. Present ages of mother and child are in the ratio of 5:1 respectively.
II. Four years hence the ratio of the ages of mother and child will be 17:5 respectively.

The average age of 32 boys of a class is equal to 15 years. When the age of the class teacher is included the average becomes 16 years. Find the age of the class teacher.