Seema’s present age is four times her son’s present age and four seventh of her father’s present age. The average of the present age of all three of them is 32 years. What is the difference between the Seema’s son’s present age and Seem’s father’s present age?

The ratio between the present ages of P and Q is 3:4 respectively. 4 years hence Q will be 5 year older than P. What is P’s present age?

The ratio of ages of A and B 4 years ago was 5 : 3. The sum of present ages of A, B and C is 80 years. If present age of C is equal to sum of present ages of A and B. find the present age of A.

The average age of 30 students is 9 years. If the age of their teacher is included, the average age become 10 years. The age of the teacher ( in years ) is

Harsha is 40 years old and Ritu is 60 years old. How many years ago was the ratio of their ages 3 : 5 ?