2 puzzles from Leonardo of Pisa, each explained in a minute and credited to the original work. Free on Savvy.
In his 1202 book Liber Abaci, Fibonacci posed a thought experiment: start with one newborn pair of rabbits, assume every pair matures in a month and produces one new pair every mon…
— Leonardo of Pisa (Fibonacci), Liber Abaci
A traveler arrives in one city, where the money in his purse doubles, then he spends 12 denari. He moves on to a second city, where his money doubles again, then he spends another …
— Leonardo of Pisa (Fibonacci), Liber Abaci