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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.
Agree! Description needs an update)
Not true vampire # test. A vampire # can not be odd number of digits, the fangs have to be split evenly, it's the first sentence of the wikipedia article...
" vampire number is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes.
So 126 isn't a vampire number.