2017 AMC 10A Problems/Problem 4
Problem
Mia is “helping” her mom pick up toys that are strewn on the floor. Mia’s mom manages to put toys into the toy box every seconds, but each time immediately after those seconds have elapsed, Mia takes toys out of the box. How much time, in minutes, will it take Mia and her mom to put all toys into the box for the first time?
Solution
Every seconds toys are put in the box, so after there will be toys in the box. Mia's mom will then put toys into to the box and we have our total amount of time to be seconds, which equals minutes.