Question 7
An ant goes out to look for food. After finding food, it immediately returns to its nest and brings back 15 more ants. These ants are still unable to move the food, so half of them return to the nest, and each brings back 10 more ants. They are still unable to move the food, so one-third of the ants return to the nest, and each brings back 8 more ants. Still unable to move the food, one-fourth of the ants return to the nest, and each brings back 6 more ants. Again, unable to move the food, one-fifth of the ants return to the nest, and each brings back 4 more ants. Finally, the ants are able to move the food. How many ants were there in total when the food was moved?