Uploaded August 2026 | Updated September 2026, 2 weeks ago
Can you solve the puzzle that's baffling the internet?
Members: there was no early access because it is a viral topic, so posting immediately is very important.
Reddit today
reddit.com/r/theydidthemath/comments/1vsgrk8/request_i_need_a_second_opinion_on_this_math
Reddit 5 years ago
reddit.com/r/theydidthemath/comments/s9k2eb/request_can_someone_do_the_math_i_swear_its_150
The Moscow Puzzles (problem 37) by Boris A. Kordemsky, edited by Martin Gardner
http://www.math.cmu.edu/~bkell/21110-2010s/algebra-puzzles.pdf
store.doverpublications.com/products/9780486270784
Fyrock's poll
youtube.com/post/UgkxztB7AMWYjz7rup7eD3-22mVDyYECuVhk
My polls
5 years ago
youtube.com/post/Ugzv_XryKGRUCCNDluN4AaABCQ
2 years ago
youtube.com/channel/UCHnj59g7jezwTy5GeL8EA_g/community?lb=Ugkx_heZWpPNenkmphzc4IqjSnyU59PCGAeE
Current
youtube.com/post/UgkxhM0HA5my2PYE7RCDX_1owQIdaoo7oUFZ
Previous post
mindyourdecisions.com/blog/2024/04/10/price-of-a-book-puzzle-again
youtu.be/0d01sKl0wtY
Singapore model
journals.sagepub.com/doi/10.1177/27527263221107526
Cost
merriam-webster.com/simple/cost
Related memes
physicsforums.com/threads/math-puzzle.477209
knowyourmeme.com/forums/just-for-fun/topics/14038-you-really-should-be-able-to-solve-this
Help me make more videos! A monthly membership directly supports the channel and allows me to make more videos that inspire students and teachers around the world. You also get early access to new videos.
Support with a YouTube membership
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Support with a Patreon membership
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Want to support with a tip or one-time donation? Every "coffee" powers me to make more videos. As they say, a mathematician is a machine for turning caffeine into theorems!
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Subscribe: youtube.com/user/MindYourDecisions?sub_confirmation=1
Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas!
If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying purchases. This does not affect the price you pay.
Book ratings are from January 2025.
My Books (worldwide links)
mindyourdecisions.com/blog/my-books/#worldwide
My Books (US links)
Mind Your Decisions: Five Book Compilation
amzn.to/2pbJ4wR
A collection of 5 books:
"The Joy of Game Theory" rated 4.2/5 stars on 564 reviews
amzn.to/1uQvA20
"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 4.2/5 stars on 55 reviews
amzn.to/1o3FaAg
"40 Paradoxes in Logic, Probability, and Game Theory" rated 4.2/5 stars on 81 reviews
amzn.to/1LOCI4U
"The Best Mental Math Tricks" rated 4.3/5 stars on 148 reviews
amzn.to/18maAdo
"Multiply Numbers By Drawing Lines" rated 4.5/5 stars on 57 reviews
amzn.to/XRm7M4
Mind Your Puzzles: Collection Of Volumes 1 To 3
amzn.to/2mMdrJr
A collection of 3 books:
"Math Puzzles Volume 1" rated 4.4/5 stars on 138 reviews
amzn.to/1GhUUSH
"Math Puzzles Volume 2" rated 4.2/5 stars on 45 reviews
amzn.to/1NKbyCs
"Math Puzzles Volume 3" rated 4.3/5 stars on 38 reviews
amzn.to/1NKbGlp
2017 Shorty Awards Nominee. Mind Your Decisions was nominated in the STEM category (Science, Technology, Engineering, and Math) along with eventual winner Bill Nye; finalists Adam Savage, Dr. Sandra Lee, Simone Giertz, Tim Peake, Unbox Therapy; and other nominees Elon Musk, Gizmoslip, Hope Jahren, Life Noggin, and Nerdwriter.
My Blog
mindyourdecisions.com/blog
Twitter
twitter.com/preshtalwalkar
Instagram
instagram.com/preshtalwalkar
Merch
teespring.com/stores/mind-your-decisions
Patreon
patreon.com/mindyourdecisions
Press
mindyourdecisions.com/blog/press
Can you solve the puzzle that's baffling the internet?
Members: there was no early access because it is a viral topic, so posting immediately is very important.
Reddit today
reddit.com/r/theydidthemath/comments/1vsgrk8/request_i_need_a_second_opinion_on_this_math
Reddit 5 years ago
reddit.com/r/theydidthemath/comments/s9k2eb/request_can_someone_do_the_math_i_swear_its_150
The Moscow Puzzles (problem 37) by Boris A. Kordemsky, edited by Martin Gardner
http://www.math.cmu.edu/~bkell/21110-2010s/algebra-puzzles.pdf
store.doverpublications.com/products/9780486270784
Fyrock's poll
youtube.com/post/UgkxztB7AMWYjz7rup7eD3-22mVDyYECuVhk
My polls
5 years ago
youtube.com/post/Ugzv_XryKGRUCCNDluN4AaABCQ
2 years ago
youtube.com/channel/UCHnj59g7jezwTy5GeL8EA_g/community?lb=Ugkx_heZWpPNenkmphzc4IqjSnyU59PCGAeE
Current
youtube.com/post/UgkxhM0HA5my2PYE7RCDX_1owQIdaoo7oUFZ
Previous post
mindyourdecisions.com/blog/2024/04/10/price-of-a-book-puzzle-again
youtu.be/0d01sKl0wtY
Singapore model
journals.sagepub.com/doi/10.1177/27527263221107526
Cost
merriam-webster.com/simple/cost
Related memes
physicsforums.com/threads/math-puzzle.477209
knowyourmeme.com/forums/just-for-fun/topics/14038-you-really-should-be-able-to-solve-this
Help me make more videos! A monthly membership directly supports the channel and allows me to make more videos that inspire students and teachers around the world. You also get early access to new videos.
Support with a YouTube membership
youtube.com/channel/UCHnj59g7jezwTy5GeL8EA_g/join
Support with a Patreon membership
patreon.com/mindyourdecisions
Want to support with a tip or one-time donation? Every "coffee" powers me to make more videos. As they say, a mathematician is a machine for turning caffeine into theorems!
Send a tip on Ko-Fi
ko-fi.com/mindyourdecisions
Send a tip on PayPal
paypal.com/donate/?hosted_button_id=REZRY3QRQPYQA
Subscribe: youtube.com/user/MindYourDecisions?sub_confirmation=1
Send me suggestions by email (address at end of many videos). I may not reply but I do consider all ideas!
If you purchase through these links, I may be compensated for purchases made on Amazon. As an Amazon Associate I earn from qualifying purchases. This does not affect the price you pay.
Book ratings are from January 2025.
My Books (worldwide links)
mindyourdecisions.com/blog/my-books/#worldwide
My Books (US links)
Mind Your Decisions: Five Book Compilation
amzn.to/2pbJ4wR
A collection of 5 books:
"The Joy of Game Theory" rated 4.2/5 stars on 564 reviews
amzn.to/1uQvA20
"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 4.2/5 stars on 55 reviews
amzn.to/1o3FaAg
"40 Paradoxes in Logic, Probability, and Game Theory" rated 4.2/5 stars on 81 reviews
amzn.to/1LOCI4U
"The Best Mental Math Tricks" rated 4.3/5 stars on 148 reviews
amzn.to/18maAdo
"Multiply Numbers By Drawing Lines" rated 4.5/5 stars on 57 reviews
amzn.to/XRm7M4
Mind Your Puzzles: Collection Of Volumes 1 To 3
amzn.to/2mMdrJr
A collection of 3 books:
"Math Puzzles Volume 1" rated 4.4/5 stars on 138 reviews
amzn.to/1GhUUSH
"Math Puzzles Volume 2" rated 4.2/5 stars on 45 reviews
amzn.to/1NKbyCs
"Math Puzzles Volume 3" rated 4.3/5 stars on 38 reviews
amzn.to/1NKbGlp
2017 Shorty Awards Nominee. Mind Your Decisions was nominated in the STEM category (Science, Technology, Engineering, and Math) along with eventual winner Bill Nye; finalists Adam Savage, Dr. Sandra Lee, Simone Giertz, Tim Peake, Unbox Therapy; and other nominees Elon Musk, Gizmoslip, Hope Jahren, Life Noggin, and Nerdwriter.
My Blog
mindyourdecisions.com/blog
twitter.com/preshtalwalkar
instagram.com/preshtalwalkar
Merch
teespring.com/stores/mind-your-decisions
Patreon
patreon.com/mindyourdecisions
Press
mindyourdecisions.com/blog/press









