The radius of a circle is increased by 10%, Then the area is increased by what percent?
A shirt was marked down 20% the first week and another 20% the next week. What percent of the regular price was the final cost of the shirt after two markdowns?
In his pocket, a boy has 3 red marbles, 4 blue marbles, and 4 green marbles. How many will he have to take out of his pocket to ensure that he has taken out at least one of each color?
In three more years, Sabrina's grandfather will be six times as old as Sabrina was last year. When Sabrina's present age is added to her grandfather's present age, the total is 68. How old is Sabrina now?
If 'n' is a positive number, 70% of 'n' is what percent of 700n?
An examiner checks 4 scripts in 5/3 hours. How many scripts can he check in 50 minutes?
In a certain English class, 1/4 of the number of girls is equal to 1/6 of the total number of students. What is the ratio of the number of girls in the class?
A person travels a distance of 25 km at a speed of 75 km/hr and then comes back at twice the speed. How many minutes did he take in total?