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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.
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I had the same problem when I was using my iPad yesterday. My connection wasn't slow so I'm thinking it's a devicee thing.
4+9+1+3 = 17
17^3 = 4913
the requirement is that a certain power of the sum of its digits is equal to the number
The expected result is correct. For help try https://gitter.im/Codewars/codewars.com/kata-solving-help