Which glass has more water, this confusing puzzle might take you back to school class, where you learned about volumes, liquids, solids, and many of the physical properties they hold.
Hopefully, you’ve learned some of that; here’s a puzzle that will put your knowledge of material properties to the test!
Observe and find out which glasses have more water. Each glass must be the same size, filled on the same level, and each glass must have an object that displaces water between it and another glass (for example, a 4 x 4 glass is a must to contain most water). Each glass should be the same size, filled to the same level, and per glass the object that displaces water from one glass to the other (i.e. A glass measuring 4 by 4 is also a must) must contain the most water.
Just like a science course, this puzzle has a few twists that may seem counterintuitive. Don’t let looks deceive you. See if you can solve the following problem:
Examine the four glasses of water below. All are the same size and are loaded to the same level. which glass has more water?
Consider the glasses and their contents, and when you think you know the answer, scroll down below to see the solution.
You’ve probably understood that the law of displacement is at play here, and that will affect the volume in each jug; what you might not have considered is that another property is meaningful in this situation. Reminisce about buoyancy.
Answer: glass 4 holds the most water.
The rubber duck toy was not inside the glass but hiding behind it. As all the glasses are the same size and filled to the same level, the jug with nothing to displace the water inside it—glass 4—must contain the most water.
We mentioned that buoyancy was an essential factor: keen spectators would have noted that rubber ducks do not sink
Therefore, the yellow duck could not have displaced any water, and the only logical answer would be that it was behind the glass (thus making transparency yet another important field at work here)!
If it’s any comfort, though, those who neglected this hoax and selected glass number 2 were on the top track. The paperclip would have displaced the tiniest amount of water—if only the rubber duck were, in fact, a water plumbean ducky.
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