# Can you solve the \$20 riddle? ft SMBC Comics' Zach Weinersmith | Summary and Q&A

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March 28, 2017
by
Physics Girl
Can you solve the \$20 riddle? ft SMBC Comics' Zach Weinersmith

## TL;DR

Physics Girl challenges Zach Weinersmith with physics trivia and riddles, including a riddle about prisoners and a logic riddle.

## Key Insights

• ❓ SMBC Comics, created by Zach Weinersmith, are popular on the internet.
• 🤒 The base SI units are fundamental in physics and include kilogram, meter, second, candela, amp, mole, and kelvin.
• 🤠 The strategy for maximizing the number of survivors in the hat game involves observing the number of hats of a certain color in front of each prisoner.

## Transcript

[MUSIC PLAYING] Hi. I'm Dianna. You're watching "Physics Girl," and I'm here with Zach Weinersmith, who is the author and mastermind behind SMBC Comics. ZACH WEINERSMITH: Yes. Saturday Morning Breakfast Cereal. I've seen your comics like all over the internet, before I knew that they were yours. And I'm sure this is pretty common. Yeah. You Have... Read More

### Q: What are the base SI units?

The base SI units are kilogram, meter, second, candela, amp, mole, and kelvin. These units are used to describe fundamental physical quantities.

### Q: Can the prisoners interact with each other after they are lined up with randomly assigned hats?

Yes, the prisoners can talk to each other before the game begins to strategize and come up with a plan. However, they can only communicate by guessing the color of the hat of the person in front of them.

### Q: What is the best strategy for the prisoners to maximize the number of survivors in the hat game?

The best strategy is for the prisoner at the back to observe the colors of the hats in front of them and determine whether the total number of hats of a certain color is odd or even. This information can then be communicated to the next prisoner who can make an informed guess.

### Q: What statement can the person make to guarantee that he will be owed \$1,000?

The person can say, "You will either give me \$1,000 or \$10." This statement creates a contradiction because if the person gives \$10, the statement is false, but if the person gives \$1,000, the statement is true.

## Summary & Key Takeaways

• Physics Girl and Zach Weinersmith discuss SMBC Comics and the popularity of a comic about a math teacher.

• They engage in a physics trivia game, answering questions about base SI units.

• They then attempt to solve a riddle about prisoners and a logic riddle.