You Don't REALLY Know the Number 200 @WrathofMath

Uploaded February 2025 | Updated September 2026, 2 weeks ago

We talk about 200 and an assortment of fun facts about it. We cover perfect and pseudoperfect numbers, the factorial base system, Harshad numbers, precocious numbers, practical numbers, Euler's totient function, and more. #maths #mathematics #mathpuzzle

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SOURCES
telegraph.co.uk/men/the-filter/qi/8622367/QI-Quite-interesting-facts-about-the-number-200.html?ICID=continue_without_subscribing_reg_first
numbersaplenty.com/200
en.wikipedia.org/wiki/200_(number)
Carl B. Boyer, A History of Mathematics, Second Edition

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0:00 The Haunted Forest
1:04 Prime Factorization
1:18 Factors
1:35 Pseudoperfect
2:23 Harshad Number
2:59 Palindromes
4:27 Sum of Squares
4:48 Four 4s
6:05 Factoradix
7:54 ABA Number
9:19 Unprimeable
9:37 Pernicious
10:20 aban iban
10:44 Practical
11:45 Euler's Totient
14:23 Diophantus
14:54 Padovan Sequence
16:26 Blue Planet (Bad Acoustic Version)

$Are You Smarter than a WW1 Draft Horse? Try everything Brilliant has to offer by visiting https://brilliant.org/wrathofmath and youll also get 20% off an annual premium subscription! An account of Clever Hans - the Orloff stallion who, after four years of intensive training with his master Wilhelm von Osten, gave performances in Berlin, Germany in the early 1900s - wowing audiences with his displays of intellect. He seemed able to read German, French, do arithmetic, convert fractions to decimals, identify tones of the musical scale and intervals in C, recognize faces from photos and more. But he was a horse...so how was this possible? Was he a 200 IQ horse? Or was the whole thing a ruse put on for money? The truth may surprise you. 🛍 Check out my math fashion brand! https://mathshion.com/ ❤️ Join Wrath of Math to get exclusive videos, lecture notes, and more: https://www.youtube.com/channel/UCyEKvaxi8mt9FMc62MHcliw/join More Math Chats: https://www.youtube.com/playlist?list=PLztBpqftvzxXQDmPmSOwXSU9vOHgty1RO Business Inquiries: wrathofmathlessons@gmail.com Follow Wrath of Math on... ● Instagram: https://www.instagram.com/wrathofmathedu ● TikTok: https://www.tiktok.com/@wrathofmathedu ● X: https://x.com/wrathofmathedu SOURCES Laasya Samhita & Hans J Gross (2013) The “Clever Hans Phenomenon” revisited, Communicative & Integrative Biology, 6:6, DOI: 10.4161/cib.27122 https://www.tandfonline.com/doi/epdf/10.4161/cib.27122?needAccess=true Clever Hans (The Horse of Mr. Von Osten) by Oskar Pfungst https://www.weirdhistorian.com/clever-hans-horse-knew-everything-sort/ https://www.scientificamerican.com/article/correspondence-1904-11-12/ https://www.mirrorservice.org/sites/ftp.ibiblio.org/pub/docs/books/gutenberg/5/4/9/2/54922/54922-h/54922-h.htm https://equilibregaia.wordpress.com/2023/02/19/hans-the-wonderhorse/ Fabio De Sio, Chantal Marazia, Clever Hans and his effects: Karl Krall and the origins of experimental parapsychology in Germany, Studies in History and Philosophy of Science Part C: Studies in History and Philosophy of Biological and Biomedical Sciences, Volume 48, Part A, 2014, Pages 94-102, https://faunalytics.org/global-animal-slaughter-statistics-and-charts/ https://www.youtube.com/watch?v=vEmKe7KlskQ https://www.amusingplanet.com/2020/05/clever-hans-horse-who-could-do-math.html https://www.instagram.com/p/DEiB8z0z4Vt/?img_index=4 0:00 The Great Question 2:03 Meet Clever Hans 3:53 Method 6:35 Hans in the Press 9:44 Tricks of the Trade 11:23 Schillings Shills 14:08 Stupid Hans 15:58 All Hans on Deck 18:19 Hans Revealed 23:11 The Clever Hans Effect 25:22 To Fill in the Gaps Which Forever Persist$

$so, there are basically no fractions$

the ANTI-martingale, which is better? #maths