Ihsan Khairir
ihsankhairir.bsky.social
Ihsan Khairir
@ihsankhairir.bsky.social
Math educator
Reposted by Ihsan Khairir
Get ready for the squarest year of our lifetimes! 2025 = 45² and we don’t get 46² until the year 2116.

AND, as a 1980 birth, I’ll get to turn 45 during the square year. I’ve been looking forward to this since when I still had hair. youtu.be/99stb2mzspI?...
Why 1980 was a great year to be born... but 2184 will be better
YouTube video by Numberphile
youtu.be
December 31, 2024 at 1:16 PM
Reposted by Ihsan Khairir
Because 2025 = 45² and 45 is a triangle number, we get these lovely sums:

2025 = (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9)²
2025 = 1³ + 2³ + 3³ + 4³ + 5³ + 6³ + 7³ + 8³ + 9³

Pleasingly the next triangle number 55 is 10 more, so get ready for a repeat of this fact in the year 3025.
December 31, 2024 at 1:32 PM
Reposted by Ihsan Khairir
Excited to bring you the latest instalment in our thermite series - How To Make An Infinitely Long Rail www.youtube.com/watch?v=Rdj5...
How To Make An Infinitely Long Rail
YouTube video by Veritasium
www.youtube.com
January 1, 2025 at 7:08 AM