A father is 5 times as old as his son. His son is 6 years old. His son is 6 years old. After how many years, will the father be 4 times as old as his son?

When Rahul was born, his father was 32 years older than his brother and his mother was 25 years older than his sister. If Rahul's brother is 6 years older than him and his mother is 3 years younger than his father, how old was Rahul's sister when he was born ?

The average age of father and his son is 22 years. The ratio of their ages is 10 : 1 respectively. What is the age of the son?

Some equations are solved on the basis of a certain system. Find out the correct answer for the unsolved equation on that basis.
If 8 + 8 = 72, 5+5 = 30 and 7+7=56, what is 6+6 =?

In a string of 20 beads, the average weight of the first 14 beads is 25 grams and that of the last 6 beads is 8 grams. What is the average weight of all the beads?

Mouni is 2 years elder than Sanjay. If the age of Sanjay 10 years ago was 13 years, then Mouni's present age is

The sum of the ages of a father and his son is 56 years. After 4 years, the father's age will be 3 times his son's age. Their ages are respectively.

The ratio of the present age of the two brothers is 1: 2. And 5 years ago this ratio was 1: 3. So what will be the ratio of their age after 5 years.