My math teacher told the class to write are own explanation for how we got the answer for the 25 billion apps challenge. First you have to go to their site and find a couple screen shots that they took every minute. Then You have to find the number to subtract from 25,000,000,000. The number you have to subtract from 25,000,000,000 is 24,658,610,121. You have to subtract 25,000,000,000 from 24,658,610,121 which equals to 341,389,879. When you get 341,389,879 you divide that number by 33,800 and once you do that you get the answer 101000 Which represents the number of minutes it will take to get to 25,000,000,000. You divide 101000 by 60 because that is how many minutes is in 1 hour and you get 1683 and then you divide that number by 24 because that is how m any hours are in a day and you get 70 then divide that by 24 and you get 2 so it will be 2 days before you reach 25,000,000,000.