/sci/ - Science & Math

Hello! Here's another problem. Seems fun so far. I haven't managed to solve it yet myself but hopefully by the end of the day I'll get it.
Perhaps it's actually quite easy to some of you folk here. Either way, if you do solve it please reply. I'll let you know if the answer is correct or not. That's all. Good luck and happy Halloween.
>>14951905
HEY! Combinatorics is a very fun subject. Very vast and diverse, counting being just one part of it. This problem I posted is actually from a combinatorics book. Anyway, I don't think you should order every book you find with combinatorics in the title. First of all, for elementary books you'd probably get so much overlap it'd be kind of a waste. Secondly some of those books might be at a very advanced level and might be useless to you. If I were you I'd do a bit of research, very little, to find one or two introductory books on combinatorics. And then do something else with the rest of the money. That's only what I think though.