The book is now available! 673
(just those submitted by Dale)
Prime Curios!
Curios: Curios Search:


Just showing those entries submitted by 'Dale': (Click here to show all)

+ There are 673 numbers N with no two same digits, having the property that when the sum of the k leftmost digits of N is divided by k the result is always an integer. [Post and Dale]

Prime Curios! © 2000-2017 (all rights reserved)