# Can you solve the giant iron riddle? - Alex Gendler

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TEDEd Animation

## Let’s Begin…

The family of giants you work for is throwing a fancy dinner party, but there’s a problem — the elder giant’s favorite shirt is wrinkled! To fix it, you’ll need to power up the giant iron. It needs two batteries to work, but the baby giant mixed the working battery pile with the dead pile. Can you test the batteries so that you get a working pair in seven tries or less? Alex Gendler shows how.

## Additional Resources for you to Explore

This problem uses a formula known as the binomial coefficient to calculate how many ways there are to choose a given number of objects from a larger set, assuming that their order doesn’t matter. For more information, you can read about the binomial coefficient, the binomial theorem, and Pascal’s Triangle.

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## Meet The Creators

• Educator Alex Gendler
• Director Outis
• Animator Nemanja Petrovic
• Sound Designer Nemanja Petrovic
• Content Producer Gerta Xhelo
• Editorial Producer Alex Rosenthal
• Associate Producer Bethany Cutmore-Scott
• Fact-Checker Brian Gutierrez

Mathematics

## The paradox at the heart of mathematics: Gödel's Incompleteness Theorem

Lesson duration 05:20

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