What Time Is It? Puzzle From Russia

Math
This was given to 13-14 year olds in Russia. Thanks to Egor Nazarov for suggesting this problem! Thanks to all patrons! Special thanks this month to Kyle, Michael Anvari, Richard Ohnemus, Shrihari Puranik. Get early access to videos and support the channel on Patreon
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My Books
“The Joy of Game Theory” shows how you can use math to out-think your competition. (rated 4.1/5 stars on 43 reviews)
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“The Irrationality Illusion: How To Make Smart Decisions And Overcome Bias” is a handbook that explains the many ways we are biased about decision-making and offers techniques to make smart decisions. (rated 3.5/5 stars on 4 reviews)
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“Math Puzzles Volume 1” features classic brain teasers and riddles with complete solutions for problems in counting, geometry, probability, and game theory. Volume 1 is rated 4.4/5 stars on 13 reviews.
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“Math Puzzles Volume 2” is a sequel book with more great problems. (rated 4.5/5 stars on 6 reviews)
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“Math Puzzles Volume 3” is the third in the series. (rated 4/5 stars on 6 reviews)
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“40 Paradoxes in Logic, Probability, and Game Theory” contains thought-provoking and counter-intuitive results. (rated 4.4/5 stars on 13 reviews)
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“The Best Mental Math Tricks” teaches how you can look like a math genius by solving problems in your head (rated 4.8/5 stars on 5 reviews)
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“Multiply Numbers By Drawing Lines” This book is a reference guide for my video that has over 1 million views on a geometric method to multiply numbers. (rated 4.3/5 stars on 6 reviews)
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