Admittedly a bit of an oversimplification. It’s from a YT video: a chocolate bar costs £1 but four wrappers gets you a free bar. How many bars can you get for £1000?
So you buy 1000 bars which gets you 1000 wrappers. Turn those in for 250 bars. With those (actually 248) you get 62 bars. Add the 2 from before and turn in 64 wrappers for 16 bars. And again for 4, then 1. It’s a sequence of quarters and the solution is 1,333.
Adding a bunch of quarters together gets a third.
Admittedly a bit of an oversimplification. It’s from a YT video: a chocolate bar costs £1 but four wrappers gets you a free bar. How many bars can you get for £1000?
So you buy 1000 bars which gets you 1000 wrappers. Turn those in for 250 bars. With those (actually 248) you get 62 bars. Add the 2 from before and turn in 64 wrappers for 16 bars. And again for 4, then 1. It’s a sequence of quarters and the solution is 1,333.