The population of rodents in a house doubles every day. Every day 25 rodents are killed. How many rodents are there if after every 4 days, the number of rodents becomes same again?
In a class there are total 63 students. The average age of girls is 24 years and that of boys is 21 years. If the average age of whole class is 22 years and 8 months, then how many boys are there in a class?
An odd day is one which has both its day and month odd for instance 13:5:2000. How many odd days are there in the year?
