5 ms·
45^2 = 2025 Happy perfect square year, everyone. The previous one was 1936 and the next one will be 2116.
by Donald 2y ago
45^2 = 2025
Happy perfect square year, everyone. The previous one was 1936 and the next one will be 2116.
- abixb 2y agoTotally nothing bad happened in the decade following the last perfect square year in 1936. :')
- anon_cow1111 2y agoWell things have already been a tad rough around this square, so if we follow the trend, the next square might turn bad even sooner. So maybe around, I dunno, 2101?
- frereubu 2y agoUnless something equivalent happened in 1849, 1764, 1691... I think we're OK :)
- jostylr 2y ago1225: ten years earlier, Magna Carta starting to limit monarchs and the seed of individual freedom 1681: eight years later was glorious revolution with a bill of rights, marking individual freedoms 1764: ten years later, beginning of American Revolution and being free of monarchs 1849: ten years-ish later, start of US civil war; was the time of an attempt by the British to end slavery around the world 1936: ten years later, colonial empires were being dismantled, UN established to attempt global cooperation, US in the ascendancy with a seed of ties being established more by economics than military force, great economic upswing lifting people out of poverty (60% in poverty then, 10% now) while the global population blossoms 2035: Majority of the global population in middle class or better, triumph of individuals over technocrats, bureaucrats, and corporatists :)
- keepamovin 2y agoI love this! Haha, I was hoping someone would do that. :)
- jthemenace 2y agoThis is the most Hacker News comment I’ve seen today. Well played.
- edoceo 2y agoUp there with Putnam and Dropbox.
- LPisGood 2y agoPutnam? Of math competition fame?
- edoceo 2y agoYep, specifically this comment: https://news.ycombinator.com/item?id=35083 https://news.ycombinator.com/item?id=35083
- chrisvalleybay 2y agoThank you for the Putnam; I did not know about it. For anyone else that did not understand this reference; https://news.ycombinator.com/item?id=35015 https://news.ycombinator.com/item?id=35015. Legendary.
- fxtentacle 2y agoThat's an epic thread. Thank you very much for sharing it :) And now, looking back 17 years later, I'd say he succeeded. It's the tarsnap founder.
- chrisvalleybay 2y agoIndeed! And it was so much fun when dhouston popped up in the thread :-)
- raverbashing 2y agoAnd "Less space than a Nomad"
- keepamovin 2y ago2025 = 515 (palindromic in base 20)
- lxgr 2y agoAlso, (20 + 25)^2 = 2,025! Happy New Year :)
- devsda 2y agoGreat to know that someone else too keeps track of squares. At the ages of perfect squares is when we all cross or achieve significant milestones in our lives as children, students, (young)adults, spouses, parents, grandparents, senior citizens of society and so on. This year being a perfect square, I wish that it will be as much or more special as it was for everyone at those ages.
- gylterud 2y agoMy youngest is fascinated by squares at the moment. Luckily for him, he is 4 years old, his older brother is 9, while I just turned 36. He will be delighted when I tell him that we are entering 45 squared!
- whycome 2y agoAlso, if you add your ages together… 7^2 If you multiply your ages… 36^2
- umeshunni 2y ago2025: 1) is a square: 45² 2) is the product of two squares: 9² x 5² 3) is the sum of 3-squares: 40²+ 20²+5² 4) is the sum of cubes of all the single digits: 1³+2³+3³+4³+5³+6³+7³+8³+9³
- _kb 2y ago5) sum of the single digits squared: (1+2+3+4+5+6+7+8+9)²
- umeshunni 2y agoSome more (thanks to chatgpt-o1) 6) sum of the first 45 odd numbers: 1+3+5+...+89 7) is a Harshad number: https://en.m.wikipedia.org/wiki/Harshad_number https://en.m.wikipedia.org/wiki/Harshad_number
- bratwurst3000 2y ago8) the sum of 2024 + 1 also
- globnomulous 2y ago6 is kind of cheating. It's a restatement of 45^2. 3^2 is the sum of the first three odd numbers. 4^2 is the sum of the first four odd numbers. 5^2 is the sum of the first five odd numbers. Edit: sorry, don't mean to be a pill.
- xerox13ster 2y ago89 isn't 9^2, 81 is.
- mkl 2y agoHuh? 89 is the 45th odd number.
- bonzini 2y ago4 and 5 too
- joseangel_sc 2y agohere’s to all be alive and well floating in amniotic liquid living in VR paradise
- jll29 2y agoDonald = Donald E. Knuth? ;-)
- jostylr 2y agoUS President number 45 returns, kind of seems like squaring applies.
- throw0101f 2y ago* https://www.numbersaplenty.com/2025 https://www.numbersaplenty.com/2025
- eddyg 2y agoAnd (20+25)^(20/(2*5)) as well.