Apple Puzzle - The Answer

(Solution Hidden)


Fill the empty basket with 1 apple from the first basket, 2 apples from the second basket, 3 from the third basket, etc.

You will end up with 55 apples, which would weigh 220 ounces if all the apples weighed 4 ounces each. Each 5 ounce apple in the basket will add 1 ounce.

Thus, you just need to weigh the basket, and the number of ounces that it weighs over 220 ounces will tell you the number of the basket containing 5 ounce apples.