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... Math Problem "How Old Is The Captain?" Subscribe: https://www.youtube.com/user/MindYourDecisions?sub_confirmation=1 ...

The 2023 Math Kangaroo had an interesting question that stumped me. Can you solve it? Kangaroo questions ...

This problem stumped me! But it has a pretty nice solution. Thanks to all patrons! Special thanks this month to Kyle, Michael Anvari ...

Can you solve the challenging underlying mathematical puzzle? Special thanks this month to: Kyle, Lee Redden, Mike Robertson, ...

This brain-teaser is supposed to be simple, but it stumps many students. Can you figure it out? Skills tested: logic, reasoning, ...

This is a pretty tricky problem. Can you solve for the angle? Watch the video for the solution. I thank Barry, and I thank Akshay ...

Can you measure exactly 5 L from buckets of sizes 3, 7, and 20 L? Percentages for grade 8 mathematics, by Determine how to ...

This puzzle has circulated for over 10 years. What is the correct answer? 1 + 1 + 1 + 1 + 1 1 + 1 + 1 + 1 + 1 1 + 1 × 0 + 1 = ?

A question assigned to 7 year old students completely stumped a mother who posted it online asking for help. Reddit AskMath ...

Four friends claim they have been wrongly imprisoned. They are not criminals but mere harmless logicians! The warden says, "If ...

The 2025 ENEM featured a question that many students found difficult. Can you solve it? Thanks to Alexandre for the suggestion!

... you can support me at Patreon: https://www.patreon.com/mindyourdecisions Connect on social media. I update each site when I ...

Thanks to Kirby Stevens for the suggestion! This tricky puzzle was unsolved until the magazine Popular Science republished it in ...

This would be considered one of the easier problems on the CSAT. What's the radius of the circle? Special thanks this month to: ...

The famous mathematician Vladimir Arnold mischievously shared a puzzle that he joking said American students could find an ...

The Putnam Exam has legendary difficulty: the average (median) score is usually 1 out of a possible 120 points. No calculators ...

What is the ratio of the square's side to the length of the chord?

This question is from the notoriously difficult university entrance exam in China, the Gaokao exam. 2019 Gaokao test posts ...

Thanks to Nahian for the suggestion! This is a difficult factorial problem. British Mathematical Olympiad 2002-2003 problem 5 ...

A challenging problem was posted to Reddit HomeworkHelp. Can you figure it out? Reddit HomeworkHelp ...