A certain sum of money at a certain rate doubles itself in 9 years, then in how many years it will become the same sum will be 5 times of itself?

If each interior angle is doubled of each exterior angle of a regular polygon with n sides, then the value of n is 

A triangle and a parallelogram are on the same base and between the same parallels. The ratio of the area of triangle and parallelogram is______. 

A container contains a mixture of acid and water in which water is 24%. If 50% of the mixture is taken out in which water is 156 liters less than the acid, then find the remaining quantity of acid in that container?

Mrs. Reena’s family has 10 males and a few women, the average monthly consumption of Wheat per head is 8 kg. If the average monthly consumption of Wheat per head be 10 kg in the case of males and 6 kg in the case of women, find the number of women in Reena’s family?

 In a test consisting of 140 Questions, a candidate correctly answered 70% of the first 80 questions. What percentage of the remaining questions does the candidate need to correctly answer to score 60% in the test?

Let ABCD be a quadrilateral. Let the diagonals AC and BD meet at O. Let the perpendicular drawn from A to CD meet CD at E. Further, AO: OC = BO: OD, AB = 30 cm. CD = 40 cm. and the area of the quadrilateral ABCD is 1050 cm². What is BE equal to?

What is the quotient , when 2645 is divided by 48 ?