Post con #ExplodingDots

#ExplodingDots

Post pubblici su X che usano #ExplodingDots.

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  1. Grant Sanderson@3blue1brown
    What are your favorite (potentially long) mathematician quotes? Bonus points if it's not just a pithy restatement of "math is beautiful", but something which changes how you think.
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  2. Samantha@APHTutoring
    @3blue1brown
    @3blue1brown From @jamestanton explaining how to perform division with #ExplodingDots, and that if you need a dot just draw an antidot... "You can do whatever you want, you just have to deal with the consequences." I've been saying this line at least once a day since I heard it.
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  3. James Tanton✓@jamestanton
    A classic (admittedly cumbersome) way to multiply. Write two numbers at top. Keep halving left number, ignoring remainders, while doubling right numbers. Cross out all the rows with even numbers to the left, add surviving numbers on the right. Sum = product. Why? (#explodingdots)
    Scarica
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  4. Howie Hua@howie_hua
    I love this alternative from @joboaler. Rather than a lot of problems, choose 4 and calculate, write a story, and draw 2 visual solutions. #explodingdots
    Scarica
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  5. James Tanton✓@jamestanton
    The picture shows that 2^6 - 1 (which is 111111 in base 2) factors and so is not prime. Not so much a puzzle today, but just an observation: Can you now see that 2^n - 1 won't ever be prime if n is composite? #explodingdots @GlobalMathProj Try listing some factors of 2^300 -1.
    Scarica
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