There are three jars filled with candies. One jar is filled with banana candies, one jar is filled with lemon candies and one jar has a mix of both. All the jars are mislabelled (i.e. all the jars have wrong labels about what kind of candies they contain).
All the candies look very similar in shape, size and color and they even smell the same. The only way to distinguish them is by tasting.
You have to eat one and only one candy to determine the correct jar labels. You can eat that one candy from any jar you want as long as you eat only one in total.
Assume the jars are labelled as follows:
- Jar 1 is labelled Lemon
- Jar 2 is labelled Banana
- Jar 3 is labelled Mix
Eat a candy from the Jar 3 which is labelled as Mix.
If it’s lemon, take the lemon label from the Jar 1 and place it on Jar 3. Now the other 2 jars have wrong labels. So Jar 2 should be labelled Mix and Jar 1 should be labelled Banana.
If the candy from Jar 3 is a banana candy, take the banana label from Jar 2 and place it on Jar 3. Now the other 2 jars have wrong labels. So Jar 1 should be labelled Mix and Jar 2 should be labelled Lemon.