I was given this problem by my 2nd grade teacher (I'm pushing 40). It took me 6 weeks to solve it, but I needed to learn and have never forgotten any of the rules you used to identify if something is divisible or not. 7 is a bitch.
Hi great video, I have a question. You reset at 3:28 bit 147 would work. One is divisible by 1, 14 is divisible by 2 and 147 is divisible by 3. So 1472589630 could work. Otherwise I misunderstood the riddle 😂 maybe cuz of my English 😅 Many greetings from Germany :)