Take a look at the following image and see if you can figure out the right answer.
There are six glasses in a straight row. The three glasses on the left are full and the three glasses on the right are empty.
Which one glass would you move to make a row of alternately full and empty glasses.

You should have it figured out by now, well done if you guessed correctly.
The answer is revealed in the image below.

Answer: You would pour the juice from the second glass into the fifth glass.
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