What is the value of x? When Ramanujan gets bored

Before Ramanujan was famous, he challenged mathematicians with this problem. He waited for more than 1.5 years for anyone to solve it, but no one provided an answer. Finally he submitted a solution himself. Learn about the brain teaser that is still inspiring mathematicians over 100 years later.

0:00 intro
1:53 problem 1
5:16 general 1
7:13 problem 2
8:43 question
10:11 fairness
11:10 proof

Wiki
https://en.wikipedia.org/wiki/Sriniva...
https://commons.wikimedia.org/wiki/Fi...
CC BY 4.0
volume 3 problem
J. Indian Math. Soc, 3 (1911), p. 90
https://babel.hathitrust.org/cgi/pt?i...
volume 3 problem cover April 1911
https://babel.hathitrust.org/cgi/pt?i...
volume 4 solution
J. Indian Math. Soc, 4 (1912), p. 226
https://babel.hathitrust.org/cgi/pt?i...
volume 4 cover Dec 1912
https://babel.hathitrust.org/cgi/pt?i...
Putnam Competition 1965-1984 (book)
https://bookstore.ams.org/view?Produc...
27th Putnam 1966 A6 (not official)
https://prase.cz/kalva/putnam/psoln/p...
alternate proofs
https://www.jstor.org/stable/2301294
https://www.ias.ac.in/article/fulltex...
https://www.isibang.ac.in/~sury/raman...
https://www.tandfonline.com/doi/abs/1...
https://math.stackexchange.com/questi...
https://math.stackexchange.com/questi...
https://www.sciencedirect.com/science...

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