3 ms·
Related numberphile video which goes into a different variation of using all digits in ascending and descending order: https://www.youtube.com/watch?v=-ruC5A9Ez
by hansonkd 2y ago
Related numberphile video which goes into a different variation of using all digits in ascending and descending order: https://www.youtube.com/watch?v=-ruC5A9EzzE https://www.youtube.com/watch?v=-ruC5A9EzzE
but in this case there is a unsolved gap!