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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Completely right, the instructions could be better. Chrono79 is answering with a 1kyu level.
You take the number and its exponent is the number of digits in said number. That is why any single digit is a Narcisitic number.
5 is 1 digit, therefore 5**1 = 5.
The author needs to rewrite the instructions, only when I made the attempt did I know that all sorts of letters can be added to the ISBN when the instructions clearly say 0 to 9 and 10 can be either 0 to 9 or X.
I'm completely lost. How is it that 5**10 is 5? To be a narcissitic number, it should be 5, but my result is 9765625. Where am I getting lost? Can someone guide me?