QR – Cure – Quizzing Realms – 239

X has decidedly Indian origins, but became more famous by the name given to Leonardo of Pisa, who studied it as a model to determine what the number of rabbits would be after a certain period of time if initially there were only two rabbits, that rabbits gave birth every month, have a gestation period of one month, never died, and reached maturity to reproduce within one month of birth.

Interestingly, although the Indian branch of mathematics dealing with X was developed around 200BC, and Leonardo explored this problem in 1202AD, Leonardo’s name is the more famous one here.

Identify X. Happy quizzing, and have a nice life, folks!

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Fourteen answers! Great! And this is indeed the Fibonacci series, named after Leonardo, son of Bonaccio, hence Fibonacci. The Indian equivalent was researched by Pingala in 200BC.