Four years ago, average age of Dev and Dinesh was 20 years. If today average age of Dev, Dinesh and Chintan is 25 years, what will be Chintan's age after 7 years?

Present ages of father and son sum to 75. Fifteen years ago father's age was eight times son's age. After 7 years, son's age will be

The age of Meena is three times the age of Reena. After 7 years, Meena’s age will be double that of Reena. Find the age of Meena after 4 years from now.

Rahul is 3 times as old as Seema. Laxmi was twice as old as Rahul four years ago. In four year's time, Rahul will be 31. What are the present ages of Seema and Laxmi?

The age of Ram, 10 years ago, was thrice the age of Rahul. 10 years after, the Ram’s age will be twice the age of Rahul. The ratio of their present ages is

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