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  2. Dear high school/college students, Here's an application of hyperbolas that you never learned

    Dear high school/college students, Here's an application of hyperbolas that you never learned

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  3. Is there (always) a line that passes through exactly 2 points?

    Is there (always) a line that passes through exactly 2 points?

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  8. The scariest thing you learn in Electrical Engineering | The Smith Chart

    The scariest thing you learn in Electrical Engineering | The Smith Chart

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  11. You can always win this game if you go second | An SOS (math olympiad) puzzle

    You can always win this game if you go second | An SOS (math olympiad) puzzle

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  13. So why does the golden ratio show up in this probability puzzle?

    So why does the golden ratio show up in this probability puzzle?

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  14. Each point is connected to its closest neighbor, how many connections can a single point have (max)?

    Each point is connected to its closest neighbor, how many connections can a single point have (max)?

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  16. BREAKING:Nigeria to ban cash withdrawals!!! XLM Stellar-powered TechStars Launches in South America!

    BREAKING:Nigeria to ban cash withdrawals!!! XLM Stellar-powered TechStars Launches in South America!

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  19. How many pairs of points can be separated by this maximum distance? | A 1957 Putnam exam problem.

    How many pairs of points can be separated by this maximum distance? | A 1957 Putnam exam problem.

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  21. A disk covering puzzle | How do you minimize the longest possible walk?

    A disk covering puzzle | How do you minimize the longest possible walk?

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  25. A surprising topological proof - Why you can always cut three objects in half with a single plane

    A surprising topological proof - Why you can always cut three objects in half with a single plane

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