Why does this fraction give the Fibonacci sequence? It’s no coincidence

You may have seen one of the following viral math facts: The first fraction seemingly gives the Fibonacci numbers. That is, the sequence of numbers that starts with 1, then 1, then each successive term is the sum of the two prior terms. So the first few Fibonacci numbers are 1,1,2,3,5,8,13,21,… Which appear on the … Read more

A Devious Bet: The Borel-Cantelli Lemma

Suppose you are offered a bet as follows, by a totally not evil and totally not a squid monster disguised as a man casino owner. The bet will have (countably) infinitely many steps. In each you win or lose money, the only thing the totally not a squid monster tells you is that in each step, on average, you gain money. Furthermore, that average increases as the bet goes on. Do you take it?