What are some cool mathematical party tricks? A few days…
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What are some cool mathematical party tricks?
A few days ago I Iearned how to calculate the day of week for any date using the Doomsday method. I can do it within 10 seconds now and I'm planning to push that time down further, but it got me thinking: what other cool math tricks could I learn?
I already memorized π to 500 digits, so not that.
Is there maybe a way to quickly calculate if a number is prime? That might be interesting.
What are your recommendations? How do I keep my mind busy and my friends impressed?
#science
source
A few days ago I Iearned how to calculate the day of week for any date using the Doomsday method. I can do it within 10 seconds now and I'm planning to push that time down further, but it got me thinking: what other cool math tricks could I learn?
I already memorized π to 500 digits, so not that.
Is there maybe a way to quickly calculate if a number is prime? That might be interesting.
What are your recommendations? How do I keep my mind busy and my friends impressed?
#science
source
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