Whats the actual answer to this viral puzzle? @MindYourDecisions
Whats the actual answer to this viral puzzle?  @MindYourDecisions
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

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Book ratings are from January 2025.

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Mind Your Decisions: Five Book Compilation
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"The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias" rated 4.2/5 stars on 55 reviews
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Mind Your Puzzles: Collection Of Volumes 1 To 3
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A collection of 3 books:
"Math Puzzles Volume 1" rated 4.4/5 stars on 138 reviews
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"Math Puzzles Volume 2" rated 4.2/5 stars on 45 reviews
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"Math Puzzles Volume 3" rated 4.3/5 stars on 38 reviews
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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.

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What's the actual answer to this viral puzzle?

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