Sjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 12 days agoIt looks so wrongsh.itjust.worksexternal-linkmessage-square72fedilinkarrow-up1626arrow-down130
arrow-up1596arrow-down1external-linkIt looks so wrongsh.itjust.worksSjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 12 days agomessage-square72fedilink
minus-squaremagic_lobster_party@fedia.iolinkfedilinkarrow-up12·12 days agoIf there’s a number that’s the most oddball in the multiplication table, it’s 7. It’s a prime number that doesn’t share any common divisors with 10, and isn’t adjacent to a divisor of 10 either. 2 and 5 are common divisors of 10, so they’re piece of cake. 3 is so small and close to 2, so it’s not too difficult to get. 9 is one off from 10, so it has a very predictable pattern. 4, 6 and 8 are even numbers, so they share common divisors with 10.
minus-squaresugar_in_your_tea@sh.itjust.workslinkfedilinkarrow-up4·11 days ago3 is easy because of the “digits sum to 3” trick, if you get stuck counting by 3s, it’s easy to reset. Oh, and the proof for this is based on our 10-based number system, so your point absolutely stands.
If there’s a number that’s the most oddball in the multiplication table, it’s 7.
It’s a prime number that doesn’t share any common divisors with 10, and isn’t adjacent to a divisor of 10 either.
2 and 5 are common divisors of 10, so they’re piece of cake.
3 is so small and close to 2, so it’s not too difficult to get.
9 is one off from 10, so it has a very predictable pattern.
4, 6 and 8 are even numbers, so they share common divisors with 10.
3 is easy because of the “digits sum to 3” trick, if you get stuck counting by 3s, it’s easy to reset. Oh, and the proof for this is based on our 10-based number system, so your point absolutely stands.