 Hey, what's going on everybody? My name is John Hammond and welcome back to another YouTube video Here I am again presenting you with a new challenge and a challenge prompt This one is called missing numbers in the problem below replace each question mark with either a 1, 3, 6 or 7 To make the numbers add up correctly each number is only used once so this is very simple It's just a little bit of math We can make a program or a little bit of Python to figure this out for us with a lot of brute force permutation stuff You could also just go through this one in your head It's pretty simple if you've got eight six if you're adding those two together and you only have a possibility to Well get a four at the very end. Well, you know, you're gonna have to add Well for one thing an eight and a six is gonna give us that four that works just fine But we know that it's gonna carry over a one So when we add a five and something else with a one you're still gonna have to get a seven That seven is too high. I won't get us all the way over there So a one plus a one is gonna get us a two. So we know what one has to be in that question mark spot We know that still we're not carrying anything over now. So we're gonna have to use something plus four He's gonna get us a one. Well, we know we can figure out that it's a simple equation We can solve for one that's gonna be the seven here four plus seven is gonna equal one with the carry over and then obviously that two plus Question mark with a one carried over two plus a three plus a one is gonna get us a two plus four Which will get us that six as the final question mark So that should be very easy to solve Mentally, but let's see we can get Python to figure out how to solve it all for us So that's our next challenge and I'll get back to you with it tomorrow But please if you can crank out some of that code on your own and we'll see it tomorrow