Logic puzzles | Recreational mathematics

Missing dollar riddle

The missing dollar riddle is a famous riddle that involves an informal fallacy. It dates to at least the 1930s, although similar puzzles are much older. (Wikipedia).

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The Mystery Multiplication

Next Puzzle: https://youtu.be/AEj4ow6EQFw. Previous puzzle: https://www.youtube.com/watch?v=ObBheF5cr44 Solution: https://www.youtube.com/watch?v=NrprVfkS_OA Music by Bertrand Laurence http://www.bertrandlaurence.com used with permission. Find me on FaceBook: https://www.facebook.com/YouTu

From playlist Tricks and Math Puzzles

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A Strange Product math problem

Here is a simple problem. Once you find the solution, you might want to try it on your friends, and even your teachers. Have fun! Next puzzle: http://www.youtube.com/watch?v=Jvygw_N_3OI Solution: http://www.youtube.com/watch?v=-Ouyg71Sbjw Previous puzzle: http://www.youtube.com/watch?v=6o-

From playlist Tricks and Math Puzzles

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Can you solve the $20 riddle? ft SMBC Comics' Zach Weinersmith

I sit down with Zach Weinersmith from SMBC comics to ask him some physics trivia and logic riddles! Find Zach at: www.smbc-comics.com/ If you liked this video check out these: Physics Puzzles and Riddles Playlist https://www.youtube.com/playlist?list=PLGO_AWB1C4GTLljYFhX2XUYzKQtMocI_K SP

From playlist Physics Puzzles and Riddles

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Can you solve the four kings' gold riddle? - Tim Ricchuiti

Imagine four kings reward you with a hundred gold coins of 100 grams each. For reference, that's about $2.2 million dollars of gold. But you've been warned ahead of time by a court jester that some of the kings may be a little dishonest. Specifically, they may have shaved off 1 gram from e

From playlist Math Minutes

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A Clock Puzzle

Enjoy this new puzzle! Next puzzle: https://youtu.be/OGtrnIhy1JM Solution: https://www.youtube.com/watch?v=uF32N6XqvoE Previous puzzle: https://youtu.be/6KwqEzyTIL8 Music by Bertrand Laurence http://www.bertrandlaurence.com used with permission. Find me on FaceBook: https://www.faceboo

From playlist Tricks and Math Puzzles

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Word Problems with trigonometry and triangles

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Word Problems with trigonometry and triangles

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Word Problems with trigonometry and triangles

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Word Problems with trigonometry and triangles

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Four Fascinating Paradoxes | Wondrium Perspectives

Paradoxes can be mind-bending, frustrating, or enjoyable puzzles to solve. Whether they come from the realm of time travel or everyday life, paradoxes can spur some of our deepest thinking and most perplexing views of the world around us. In this episode of Perspectives, several experts c

From playlist Wondrium Perspectives

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4 Logic Riddles ft. SciShow!

Hank Green, Caitlin Hofmeister, and Jessi Castaneda try the Cognitive Reflection Test. Make sure you SUBSCRIBE to BrainCraft! http://ow.ly/rt5IE And I'm on SciShow Talk Show! https://www.youtube.com/watch?v=kdwBjPUK9WI BrainCraft is created by Vanessa Hill and brought to you by PBS Digita

From playlist Brain Teasers! (with friends 👯)

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Mind Blown - Hangout to Explore How Your Brain Works | Brain Games

Push your gray matter to the limit with Jason Silva, a techno-philosopher and host of the National Geographic Channel's hit show Brain Games. In this Google+ Hangout from July 23, 2013, we discuss how technology is allowing us to extend and augment the human brain and what fantastic new fo

From playlist Brain Games | National Geographic

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Simple riddle stumps the internet...again

I bought a cow for $800. I sold it for $1000. I bought it again for $1100. I sold it again for $1300. How much did I earn? This seemingly simple problem has sparked plenty of discussion online, and top search results are even showing the wrong answer. It's time to present the correct answe

From playlist Viral Math Memes

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Inconsistent systems of equations | Algebra II | Khan Academy

Systems of equations without a solution Watch the next lesson: https://www.khanacademy.org/math/algebra2/systems_eq_ineq/systems_tutorial_precalc/v/infinite-solutions-to-systems?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraII Missed the previous lesson? https://www.khanacademy.org/

From playlist Mathematics I | High School Math | Khan Academy

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Class 5: Blockchain Technology & Cryptocurrencies

MIT 15.S08 FinTech: Shaping the Financial World, Spring 2020 Instructor: Prof. Gary Gensler View the complete course: https://ocw.mit.edu/15-S08S20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61Q_RVDn6srWbLV_zFnd9n0 This class covers blockchain technology and crypto

From playlist MIT 15.S08 FinTech: Shaping the Financial World, Spring 2020

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Solving a trigonometric equation with an undefined answer of cosine

👉 Learn how to solve trigonometric equations by factoring out the GCF. When solving trigonometric equations involving the multiples of the same trigonometric function. It is very useful to collect similar trigonometric functions together and then factor out the GCF. This enables us to use

From playlist Solve Trigonometric Equations

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iPhone's Security Is More Broken Than You Think

For over two years, 14 critical zero-day vulnerabilities in Apple's iOS have been weaponized into 5 privilege-escalating zero-click exploit chains that have remotely and completely taken over hundreds of thousands of iPhones. Apple's response? Not a big deal. This was just "narrow" "target

From playlist Decrypted Lies

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Ignorance & Censorship | Philosophy Tube

A video about ignorance, something I'm a world expert in ❓🤫 ❓ https://www.patreon.com/PhilosophyTube Subscribe! http://tinyurl.com/pr99a46 Paypal.me/PhilosophyTube Twitter: @PhilosophyTube Email: philosophytubebusiness@gmail.com Facebook: http://tinyurl.com/jgjek5w realphilosophytube

From playlist The Main Show

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Word Problems using trigonometry and bearings

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Word Problems using trigonometry and bearings

👉 Learn how to solve the word problems with trigonometry. Word problems involving angles, including but not limited to: bearings, angle of elevations and depressions, triangles problems etc are solved using trigonometry. To be able to solve these problems it is important that you have a gr

From playlist Evaluate Inverse Trigonometric Functions

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Missing square puzzle