DAY 278
It takes Andrew one minute to fill his aquarium 1/3 full. How long will it take him to fill the aquarium 3/4 full?

Answer:

2 1/4 minutes.......It takes one minute to fill the aquarium 4/12 full. 3/4 full would be 9/12, a difference of 5/12. 4/12 more takes another minute, and 1/12 would be 1/4 of minute.