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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.
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the problem is that in my native language the sum of a sequence of integers means a bit different thing. for instance the sum of a sequence of 2 6 2 is 10, not 12 or 38 or 66 etc.
it shouldnt be at level 8, may be 7 but not 8