Average age of three brothers is 16 years . Average age of these brothers along with their father is 25 years. What is the age of their father ?

If a number of divisible by 102, then it is also divisible by :

The compund interest at 10% per annum on a certain amount of money for two years is TK. 10.50. Then what is th...

With 12.50% simple interest rate how many years are needed for a principal to get double ?

The population of a country doubled every 10 years from 1980 to 2010 . What was the percent increase in popula...

Two people were hired to plough a field for a total of Tk. 498 . They completed the job with one person workin...

A 140 liter mixture of milk and water contains 20% water. How much milk , in liter, must be added to the mixtu...