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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.
Modulo and difference are not the same thing.
Testing for mod(77, 28): expected 49 to equal 21; Hmmm |77-28| = 49; what is the 21??.
And
Testing for mod(37, 92): expected 55 to equal 37; |37-92| = 55, but not 37....
wow!